diff --git a/idea/src/org/jetbrains/kotlin/idea/quickfix/ChangeVariableMutabilityFix.kt b/idea/src/org/jetbrains/kotlin/idea/quickfix/ChangeVariableMutabilityFix.kt
index d164dd7887a..bf9ca7a7fec 100644
--- a/idea/src/org/jetbrains/kotlin/idea/quickfix/ChangeVariableMutabilityFix.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/quickfix/ChangeVariableMutabilityFix.kt
@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.diagnostics.Diagnostic
 import org.jetbrains.kotlin.diagnostics.Errors
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.psi.*
+import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils
 
 class ChangeVariableMutabilityFix(element: KtNamedDeclaration, private val makeVar: Boolean) : KotlinQuickFixAction<KtNamedDeclaration>(element) {
@@ -35,7 +36,9 @@ class ChangeVariableMutabilityFix(element: KtNamedDeclaration, private val makeV
     override fun isAvailable(project: Project, editor: Editor?, file: PsiFile): Boolean {
         return when (element) {
             is KtProperty -> element.isVar != makeVar
-            is KtParameter -> (element.valOrVarKeyword == KtTokens.VAR_KEYWORD) != makeVar
+            is KtParameter ->
+                element.getStrictParentOfType<KtPrimaryConstructor>()?.valueParameterList == element.parent
+                && (element.valOrVarKeyword == KtTokens.VAR_KEYWORD) != makeVar
             else -> false
         }
     }
diff --git a/idea/testData/quickfix/variables/changeMutability/funParameter.kt b/idea/testData/quickfix/variables/changeMutability/funParameter.kt
new file mode 100644
index 00000000000..7424f192c32
--- /dev/null
+++ b/idea/testData/quickfix/variables/changeMutability/funParameter.kt
@@ -0,0 +1,5 @@
+// "Make variable mutable" "false"
+// ERROR: Val cannot be reassigned
+fun fun1(i: Int) {
+    <caret>i = 2
+}
\ No newline at end of file
diff --git a/idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java b/idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java
index 93e73e77b80..3b44c9b91d9 100644
--- a/idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java
+++ b/idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java
@@ -7460,6 +7460,12 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
                 KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/quickfix/variables/changeMutability"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), true);
             }
 
+            @TestMetadata("funParameter.kt")
+            public void testFunParameter() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/variables/changeMutability/funParameter.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("localInGetter.kt")
             public void testLocalInGetter() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/variables/changeMutability/localInGetter.kt");