diff --git a/compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/ResolutionParts.kt b/compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/ResolutionParts.kt
index a9e2a9b37e3..e11d197ad87 100644
--- a/compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/ResolutionParts.kt
+++ b/compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/ResolutionParts.kt
@@ -140,7 +140,7 @@ internal object CreateFreshVariablesSubstitutor : ResolutionPart() {
             return
         }
 
-        val typeParameters = candidateDescriptor.typeParameters
+        val typeParameters = candidateDescriptor.original.typeParameters
         for (index in typeParameters.indices) {
             val typeParameter = typeParameters[index]
             val freshVariable = toFreshVariables.freshVariables[index]