diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/intrinsics/ArrayGet.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/intrinsics/ArrayGet.kt
index 361515f4284..a51cd3e17fc 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/intrinsics/ArrayGet.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/intrinsics/ArrayGet.kt
@@ -19,12 +19,15 @@ package org.jetbrains.kotlin.backend.jvm.intrinsics
 import org.jetbrains.kotlin.backend.jvm.codegen.*
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.ir.expressions.IrFunctionAccessExpression
+import org.jetbrains.org.objectweb.asm.Type
 
 object ArrayGet : IntrinsicMethod() {
     override fun invoke(expression: IrFunctionAccessExpression, codegen: ExpressionCodegen, data: BlockInfo): PromisedValue? {
         val receiver = expression.dispatchReceiver!!.accept(codegen, data).materialized
         val elementType = AsmUtil.correctElementType(receiver.type)
-        expression.getValueArgument(0)!!.accept(codegen, data).materialize()
+        expression.getValueArgument(0)!!.accept(codegen, data)
+            .coerce(Type.INT_TYPE, codegen.context.irBuiltIns.intType)
+            .materialize()
         codegen.mv.aload(elementType)
         return MaterialValue(codegen, elementType, expression.type)
     }
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/intrinsics/ArraySet.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/intrinsics/ArraySet.kt
index 58c3f5b751f..6b59311a5f0 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/intrinsics/ArraySet.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/intrinsics/ArraySet.kt
@@ -20,13 +20,14 @@ import org.jetbrains.kotlin.backend.jvm.codegen.*
 import org.jetbrains.kotlin.backend.jvm.ir.getArrayElementType
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.ir.expressions.IrFunctionAccessExpression
+import org.jetbrains.org.objectweb.asm.Type
 
 object ArraySet : IntrinsicMethod() {
     override fun invoke(expression: IrFunctionAccessExpression, codegen: ExpressionCodegen, data: BlockInfo): PromisedValue? {
         val receiver = expression.dispatchReceiver!!.accept(codegen, data).materialized
         val elementType = AsmUtil.correctElementType(receiver.type)
         val elementIrType = receiver.irType.getArrayElementType(codegen.context.irBuiltIns)
-        expression.getValueArgument(0)!!.accept(codegen, data).materialize()
+        expression.getValueArgument(0)!!.accept(codegen, data).coerce(Type.INT_TYPE, codegen.context.irBuiltIns.intType).materialize()
         expression.getValueArgument(1)!!.accept(codegen, data).coerce(elementType, elementIrType).materialize()
         codegen.mv.astore(elementType)
         return codegen.immaterialUnitValue
diff --git a/compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt b/compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt
new file mode 100644
index 00000000000..6d282bc3b38
--- /dev/null
+++ b/compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt
@@ -0,0 +1,14 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+
+fun test(ix: Int?): String {
+    val arr = arrayOf("fail 1")
+
+    if (ix != null) {
+        arr[ix] = "OK"
+        return arr[ix]
+    }
+    return "fail 2"
+}
+
+fun box() = test(0)
+
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
index ec797069fe3..b384c7608c6 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
@@ -18693,6 +18693,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullAsNullableIntIsNull.kt");
         }
 
+        @TestMetadata("nullableAsIndex.kt")
+        public void testNullableAsIndex() throws Exception {
+            runTest("compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt");
+        }
+
         @TestMetadata("nullableCharBoolean.kt")
         public void testNullableCharBoolean() throws Exception {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullableCharBoolean.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index d176f36a7ff..a4e1794a3fb 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -18693,6 +18693,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/primitiveTypes/nullAsNullableIntIsNull.kt");
         }
 
+        @TestMetadata("nullableAsIndex.kt")
+        public void testNullableAsIndex() throws Exception {
+            runTest("compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt");
+        }
+
         @TestMetadata("nullableCharBoolean.kt")
         public void testNullableCharBoolean() throws Exception {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullableCharBoolean.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
index c9bae2fcaf6..e0dfebc8851 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
@@ -17177,6 +17177,11 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             runTest("compiler/testData/codegen/box/primitiveTypes/nullAsNullableIntIsNull.kt");
         }
 
+        @TestMetadata("nullableAsIndex.kt")
+        public void testNullableAsIndex() throws Exception {
+            runTest("compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt");
+        }
+
         @TestMetadata("nullableCharBoolean.kt")
         public void testNullableCharBoolean() throws Exception {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullableCharBoolean.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
index 0b2c5cb83f3..dc63f827001 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
@@ -17177,6 +17177,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/primitiveTypes/nullAsNullableIntIsNull.kt");
         }
 
+        @TestMetadata("nullableAsIndex.kt")
+        public void testNullableAsIndex() throws Exception {
+            runTest("compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt");
+        }
+
         @TestMetadata("nullableCharBoolean.kt")
         public void testNullableCharBoolean() throws Exception {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullableCharBoolean.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 d2cbabfbf1b..745f98153ce 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
@@ -14413,6 +14413,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullAsNullableIntIsNull.kt");
         }
 
+        @TestMetadata("nullableAsIndex.kt")
+        public void testNullableAsIndex() throws Exception {
+            runTest("compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt");
+        }
+
         @TestMetadata("nullableCharBoolean.kt")
         public void testNullableCharBoolean() throws Exception {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullableCharBoolean.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 66575d9f10a..7dfaf052892 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
@@ -15593,6 +15593,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullAsNullableIntIsNull.kt");
         }
 
+        @TestMetadata("nullableAsIndex.kt")
+        public void testNullableAsIndex() throws Exception {
+            runTest("compiler/testData/codegen/box/primitiveTypes/nullableAsIndex.kt");
+        }
+
         @TestMetadata("nullableCharBoolean.kt")
         public void testNullableCharBoolean() throws Exception {
             runTest("compiler/testData/codegen/box/primitiveTypes/nullableCharBoolean.kt");