diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirTypeCompatibilityHelpers.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirTypeCompatibilityHelpers.kt
index 86c2f570a35..1838c66f5ab 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirTypeCompatibilityHelpers.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirTypeCompatibilityHelpers.kt
@@ -88,9 +88,7 @@ internal class ArgumentInfo(
     val originalType: ConeKotlinType,
     val session: FirSession,
 ) {
-    val smartCastType: ConeKotlinType by lazy {
-        if (argument !is FirSmartCastExpression) originalType else userType.fullyExpandedType(session)
-    }
+    val smartCastType: ConeKotlinType by lazy { userType.fullyExpandedType(session) }
 
     val originalTypeInfo get() = originalType.toTypeInfo(session)