diff --git a/plugins/parcelize/parcelize-compiler/parcelize.k2/src/org/jetbrains/kotlin/parcelize/fir/diagnostics/FirParcelizePropertyChecker.kt b/plugins/parcelize/parcelize-compiler/parcelize.k2/src/org/jetbrains/kotlin/parcelize/fir/diagnostics/FirParcelizePropertyChecker.kt
index 88348301953..53e5303d335 100644
--- a/plugins/parcelize/parcelize-compiler/parcelize.k2/src/org/jetbrains/kotlin/parcelize/fir/diagnostics/FirParcelizePropertyChecker.kt
+++ b/plugins/parcelize/parcelize-compiler/parcelize.k2/src/org/jetbrains/kotlin/parcelize/fir/diagnostics/FirParcelizePropertyChecker.kt
@@ -65,7 +65,7 @@ object FirParcelizePropertyChecker : FirPropertyChecker() {
         context: CheckerContext,
         reporter: DiagnosticReporter
     ) {
-        val type = property.returnTypeRef.coneType
+        val type = property.returnTypeRef.coneType.fullyExpandedType(context.session)
         if (type is ConeErrorType || containingClassSymbol.hasCustomParceler(context.session) || property.hasIgnoredOnParcel()) {
             return
         }
diff --git a/plugins/parcelize/parcelize-compiler/testData/diagnostics/unsupportedType.kt b/plugins/parcelize/parcelize-compiler/testData/diagnostics/unsupportedType.kt
index 56b5288b25a..987a22ec693 100644
--- a/plugins/parcelize/parcelize-compiler/testData/diagnostics/unsupportedType.kt
+++ b/plugins/parcelize/parcelize-compiler/testData/diagnostics/unsupportedType.kt
@@ -1,10 +1,14 @@
 // FIR_IDENTICAL
+
 package test
 
 import kotlinx.parcelize.Parcelize
 import kotlinx.parcelize.RawValue
 import android.os.Parcelable
 
+typealias TypeAlias = Any
+typealias RawValueTypeAlias = @RawValue Any
+
 @Parcelize
 class User(
         val a: String,
@@ -14,5 +18,7 @@ class User(
         val e: @RawValue Any?,
         val f: @RawValue Map<String, Any>,
         val g: Map<String, @RawValue Any>,
-        val h: Map<@RawValue Any, List<@RawValue Any>>
+        val h: Map<@RawValue Any, List<@RawValue Any>>,
+        val i: @RawValue TypeAlias,
+        val j: RawValueTypeAlias,
 ) : Parcelable