diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/JvmRuntimeTypes.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/JvmRuntimeTypes.kt
index a6e32c1f5da..41300265001 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/JvmRuntimeTypes.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/JvmRuntimeTypes.kt
@@ -162,7 +162,7 @@ class JvmRuntimeTypes(
             referencedFunction.isSuspend || isSuspendConversion
         )
 
-        val suspendFunctionType = if (referencedFunction.isSuspend) suspendFunctionInterface?.defaultType else null
+        val suspendFunctionType = if (referencedFunction.isSuspend || isSuspendConversion) suspendFunctionInterface?.defaultType else null
         val superClass = when {
             generateOptimizedCallableReferenceSuperClasses -> when {
                 isAdaptedCallableReference || isSuspendConversion -> adaptedFunctionReference
diff --git a/compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java b/compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
index 9ecb79b7683..22e2171c965 100644
--- a/compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
+++ b/compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
@@ -2227,6 +2227,11 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineWithParameters.kt");
                 }
 
+                @TestMetadata("isAs.kt")
+                public void testIsAs() throws Exception {
+                    runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt");
+                }
+
                 @TestMetadata("simple.kt")
                 public void testSimple() throws Exception {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/simple.kt");
diff --git a/compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt b/compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt
new file mode 100644
index 00000000000..df9f1d7a009
--- /dev/null
+++ b/compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt
@@ -0,0 +1,23 @@
+// !LANGUAGE: +SuspendConversion
+// WITH_RUNTIME
+// WITH_COROUTINES
+
+import helpers.*
+import kotlin.coroutines.*
+
+fun callMe(): String = "OK"
+
+suspend fun isSuspend(c: suspend () -> String) = c is suspend () -> String
+suspend fun callSuspend(c: suspend () -> String) = (c as suspend () -> String)()
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(EmptyContinuation)
+}
+
+fun box(): String {
+    var res = "FAIL"
+    builder {
+        res = if (isSuspend(::callMe)) callSuspend(::callMe) else "!isSuspend"
+    }
+    return res
+}
\ No newline at end of file
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
index c91ab5a5bee..a118b4ccc18 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
@@ -2247,6 +2247,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineWithParameters.kt");
                 }
 
+                @TestMetadata("isAs.kt")
+                public void testIsAs() throws Exception {
+                    runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt");
+                }
+
                 @TestMetadata("simple.kt")
                 public void testSimple() throws Exception {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/simple.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index 691a5928d52..a1bdcd49624 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -2247,6 +2247,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineWithParameters.kt");
                 }
 
+                @TestMetadata("isAs.kt")
+                public void testIsAs() throws Exception {
+                    runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt");
+                }
+
                 @TestMetadata("simple.kt")
                 public void testSimple() throws Exception {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/simple.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
index 41bd8030c2c..c07cb2cab4a 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
@@ -2227,6 +2227,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineWithParameters.kt");
                 }
 
+                @TestMetadata("isAs.kt")
+                public void testIsAs() throws Exception {
+                    runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt");
+                }
+
                 @TestMetadata("simple.kt")
                 public void testSimple() throws Exception {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/simple.kt");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java
index 94edfe2f408..093c8ce7af9 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java
@@ -1642,6 +1642,11 @@ public class IrJsCodegenBoxES6TestGenerated extends AbstractIrJsCodegenBoxES6Tes
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineWithParameters.kt");
                 }
 
+                @TestMetadata("isAs.kt")
+                public void testIsAs() throws Exception {
+                    runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt");
+                }
+
                 @TestMetadata("simple.kt")
                 public void testSimple() throws Exception {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/simple.kt");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
index 293938cfe35..fe88e653616 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
@@ -1642,6 +1642,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineWithParameters.kt");
                 }
 
+                @TestMetadata("isAs.kt")
+                public void testIsAs() throws Exception {
+                    runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt");
+                }
+
                 @TestMetadata("simple.kt")
                 public void testSimple() throws Exception {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/simple.kt");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
index dfef036fbf2..fa1b3c1b08c 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
@@ -1642,6 +1642,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineWithParameters.kt");
                 }
 
+                @TestMetadata("isAs.kt")
+                public void testIsAs() throws Exception {
+                    runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/isAs.kt");
+                }
+
                 @TestMetadata("simple.kt")
                 public void testSimple() throws Exception {
                     runTest("compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/simple.kt");