diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/diagnostics/SerializationErrors.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/diagnostics/SerializationErrors.kt
index 26291f52fcb..c6e9f3e43cc 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/diagnostics/SerializationErrors.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/diagnostics/SerializationErrors.kt
@@ -41,7 +41,7 @@ internal object KtDefaultSerializationErrorMessages : BaseDiagnosticRendererFact
 internal object SerializationDiagnosticRenderers {
     val CONFLICTING_KLIB_SIGNATURES_DATA =
         CommonRenderers.renderConflictingSignatureData<DeclarationDescriptor, ConflictingKlibSignaturesData>(
-            signatureKind = "KLIB",
+            signatureKind = "IR",
             sortUsing = MemberComparator.INSTANCE,
             declarationRenderer = Renderer {
                 DescriptorRenderer.WITHOUT_MODIFIERS.render(it)
diff --git a/compiler/testData/diagnostics/klibSerializationTests/signatureClash.diag.txt b/compiler/testData/diagnostics/klibSerializationTests/signatureClash.diag.txt
index 3cd11200b93..fc99ca58a4f 100644
--- a/compiler/testData/diagnostics/klibSerializationTests/signatureClash.diag.txt
+++ b/compiler/testData/diagnostics/klibSerializationTests/signatureClash.diag.txt
@@ -1,14 +1,14 @@
-/foo.kt:13:1: error: Platform declaration clash: The following declarations have the same KLIB signature (com.example.klib.serialization.diagnostics/foo|foo(){}[0]):
+/foo.kt:13:1: error: Platform declaration clash: The following declarations have the same IR signature (com.example.klib.serialization.diagnostics/foo|foo(){}[0]):
     fun foo(): kotlin.Long defined in com.example.klib.serialization.diagnostics
     fun foo(): kotlin.String defined in com.example.klib.serialization.diagnostics
     fun foo(): kotlin.Int defined in com.example.klib.serialization.diagnostics
 
-/main.kt:19:1: error: Platform declaration clash: The following declarations have the same KLIB signature (com.example.klib.serialization.diagnostics/foo|foo(){}[0]):
+/main.kt:19:1: error: Platform declaration clash: The following declarations have the same IR signature (com.example.klib.serialization.diagnostics/foo|foo(){}[0]):
     fun foo(): kotlin.Long defined in com.example.klib.serialization.diagnostics
     fun foo(): kotlin.String defined in com.example.klib.serialization.diagnostics
     fun foo(): kotlin.Int defined in com.example.klib.serialization.diagnostics
 
-/main.kt:22:1: error: Platform declaration clash: The following declarations have the same KLIB signature (com.example.klib.serialization.diagnostics/foo|foo(){}[0]):
+/main.kt:22:1: error: Platform declaration clash: The following declarations have the same IR signature (com.example.klib.serialization.diagnostics/foo|foo(){}[0]):
     fun foo(): kotlin.Long defined in com.example.klib.serialization.diagnostics
     fun foo(): kotlin.String defined in com.example.klib.serialization.diagnostics
     fun foo(): kotlin.Int defined in com.example.klib.serialization.diagnostics
diff --git a/native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/output.txt b/native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/output.txt
index bead3034b14..35de65c7ef3 100644
--- a/native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/output.txt
+++ b/native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/output.txt
@@ -1,9 +1,9 @@
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:4:5: error: platform declaration clash: The following declarations have the same KLIB signature (com.example.klib.serialization.diagnostics/A.foo|foo(){}[0]):
+native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:4:5: error: platform declaration clash: The following declarations have the same IR signature (com.example.klib.serialization.diagnostics/A.foo|foo(){}[0]):
     fun foo(): kotlin.String defined in com.example.klib.serialization.diagnostics.A
     fun foo(): kotlin.Int defined in com.example.klib.serialization.diagnostics.A
     @Deprecated("", level = DeprecationLevel.HIDDEN)
     ^
-native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:7:5: error: platform declaration clash: The following declarations have the same KLIB signature (com.example.klib.serialization.diagnostics/A.foo|foo(){}[0]):
+native/native.tests/testData/compilerOutput/SignatureClashDiagnostics/main.kt:7:5: error: platform declaration clash: The following declarations have the same IR signature (com.example.klib.serialization.diagnostics/A.foo|foo(){}[0]):
     fun foo(): kotlin.String defined in com.example.klib.serialization.diagnostics.A
     fun foo(): kotlin.Int defined in com.example.klib.serialization.diagnostics.A
     fun foo(): Int = 0