diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinMangler.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinMangler.kt
index 1101ab07e20..97f0d691d8c 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinMangler.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinMangler.kt
@@ -58,6 +58,10 @@ abstract class KotlinManglerImpl : KotlinMangler {
 
         if (declaration.isPlatformSpecificExported()) return true
 
+        if (declaration is IrTypeAlias && declaration.parent is IrPackageFragment) {
+            return true
+        }
+
         if (descriptorAnnotations.hasAnnotation(publishedApiAnnotation)) {
             return true
         }
diff --git a/compiler/testData/codegen/box/typealias/privateInKlib.kt b/compiler/testData/codegen/box/typealias/privateInKlib.kt
new file mode 100644
index 00000000000..fc9e1658ca3
--- /dev/null
+++ b/compiler/testData/codegen/box/typealias/privateInKlib.kt
@@ -0,0 +1,22 @@
+// MODULE: lib
+// FILE: f1.kt
+
+private typealias TA = String
+
+public interface I {
+    public fun foo(): TA
+}
+
+open public class B: I {
+    override fun foo() = "OK"
+}
+
+// FILE: f2.kt
+
+
+public class D: B()
+
+// MODULE: main(lib)
+// FILE: m.kt
+
+fun box() = D().foo()
\ 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 eece3b49929..35966f50c11 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
@@ -25131,6 +25131,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/typealias/objectLiteralConstructor.kt");
         }
 
+        @TestMetadata("privateInKlib.kt")
+        public void testPrivateInKlib() throws Exception {
+            runTest("compiler/testData/codegen/box/typealias/privateInKlib.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/typealias/simple.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index 5cc5a669c8e..b3e0cd4bca5 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -25131,6 +25131,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/typealias/objectLiteralConstructor.kt");
         }
 
+        @TestMetadata("privateInKlib.kt")
+        public void testPrivateInKlib() throws Exception {
+            runTest("compiler/testData/codegen/box/typealias/privateInKlib.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/typealias/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 d3a619c9605..4921928e01a 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
@@ -24031,6 +24031,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/typealias/objectLiteralConstructor.kt");
         }
 
+        @TestMetadata("privateInKlib.kt")
+        public void testPrivateInKlib() throws Exception {
+            runTest("compiler/testData/codegen/box/typealias/privateInKlib.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/typealias/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 bbb5261f590..693630e8b22 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
@@ -19181,6 +19181,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/typealias/objectLiteralConstructor.kt");
         }
 
+        @TestMetadata("privateInKlib.kt")
+        public void testPrivateInKlib() throws Exception {
+            runTest("compiler/testData/codegen/box/typealias/privateInKlib.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/typealias/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 d623be891f6..84b2afb2923 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
@@ -20336,6 +20336,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/typealias/objectLiteralConstructor.kt");
         }
 
+        @TestMetadata("privateInKlib.kt")
+        public void testPrivateInKlib() throws Exception {
+            runTest("compiler/testData/codegen/box/typealias/privateInKlib.kt");
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             runTest("compiler/testData/codegen/box/typealias/simple.kt");