diff --git a/compiler/fir/psi2fir/src/org/jetbrains/kotlin/fir/builder/RawFirBuilder.kt b/compiler/fir/psi2fir/src/org/jetbrains/kotlin/fir/builder/RawFirBuilder.kt
index 822a7e2182c..dc10d467331 100644
--- a/compiler/fir/psi2fir/src/org/jetbrains/kotlin/fir/builder/RawFirBuilder.kt
+++ b/compiler/fir/psi2fir/src/org/jetbrains/kotlin/fir/builder/RawFirBuilder.kt
@@ -246,7 +246,7 @@ class RawFirBuilder(val session: FirSession, val stubMode: Boolean) {
                 when {
                     typeReference != null -> typeReference.toFirOrErrorType()
                     defaultTypeRef != null -> defaultTypeRef
-                    else -> null.toFirOrErrorType()
+                    else -> null.toFirOrImplicitType()
                 },
                 if (hasDefaultValue()) {
                     { defaultValue }.toFirExpression("Should have default value")