diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/ConeTypeCompatibilityChecker.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/ConeTypeCompatibilityChecker.kt
index 5bf589ab218..1a5b99090c9 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/ConeTypeCompatibilityChecker.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/ConeTypeCompatibilityChecker.kt
@@ -89,9 +89,6 @@ object ConeTypeCompatibilityChecker {
 
         // Next can simply focus on the type hierarchy and don't need to worry about nullability.
         val compatibilityUpperBound = when {
-            all {
-                it.isPrimitive
-            } -> Compatibility.SOFT_INCOMPATIBLE // TODO: remove after KT-46383 is fixed
             all {
                 it.isConcreteType()
             } -> Compatibility.HARD_INCOMPATIBLE