diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/ReturnTypeCalculator.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/ReturnTypeCalculator.kt
index c64f181ee01..11d1b219126 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/ReturnTypeCalculator.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/ReturnTypeCalculator.kt
@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.fir.declarations.FirTypedDeclaration
 import org.jetbrains.kotlin.fir.diagnostics.DiagnosticKind
 import org.jetbrains.kotlin.fir.diagnostics.ConeSimpleDiagnostic
 import org.jetbrains.kotlin.fir.render
+import org.jetbrains.kotlin.fir.scopes.FakeOverrideTypeCalculator
 import org.jetbrains.kotlin.fir.types.FirResolvedTypeRef
 import org.jetbrains.kotlin.fir.types.builder.buildErrorTypeRef
 
@@ -20,6 +21,9 @@ class ReturnTypeCalculatorForFullBodyResolve : ReturnTypeCalculator {
     override fun tryCalculateReturnType(declaration: FirTypedDeclaration): FirResolvedTypeRef {
         val returnTypeRef = declaration.returnTypeRef
         if (returnTypeRef is FirResolvedTypeRef) return returnTypeRef
+        if (declaration.origin.fromSupertypes) {
+            return FakeOverrideTypeCalculator.Forced.computeReturnType(declaration)
+        }
 
         return buildErrorTypeRef {
             diagnostic = ConeSimpleDiagnostic(