diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
index dba53cfb583..afd5640d682 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
@@ -381,6 +381,7 @@ fun isOverriding(
 ): Boolean {
     val typeCheckerContext = IrTypeCheckerContext(irBuiltIns) as AbstractTypeCheckerContext
     fun equalTypes(first: IrType, second: IrType): Boolean {
+        if (first is IrErrorType || second is IrErrorType) return false
         return AbstractTypeChecker.equalTypes(
             typeCheckerContext, first, second
         ) ||