diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
index 06f51c3d945..a9192d379b0 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
@@ -582,9 +582,9 @@ class ExpressionCodegen(
             }
 
             IrTypeOperator.IMPLICIT_NOTNULL -> {
-                gen(expression.argument, OBJECT_TYPE, data)
+                gen(expression.argument, asmType, data)
                 mv.dup()
-                mv.visitLdcInsn("TODO provide message") /*TODO*/
+                mv.visitLdcInsn("TODO provide message for IMPLICIT_NOTNULL") /*TODO*/
                 mv.invokestatic("kotlin/jvm/internal/Intrinsics", "checkExpressionValueIsNotNull",
                                "(Ljava/lang/Object;Ljava/lang/String;)V", false)
             }
@@ -1040,4 +1040,4 @@ fun DefaultCallArgs.generateOnStackIfNeeded(callGenerator: IrCallGenerator, isCo
         callGenerator.putValueIfNeeded(parameterType, StackValue.constant(null, parameterType), ValueKind.METHOD_HANDLE_IN_DEFAULT, -1, codegen)
     }
     return toInts.isNotEmpty()
-}
\ No newline at end of file
+}