diff --git a/scala/scala-impl/src/org/jetbrains/plugins/scala/extensions/ParenthesizedElement.scala b/scala/scala-impl/src/org/jetbrains/plugins/scala/extensions/ParenthesizedElement.scala
index d0140357e0f..3701db54646 100644
--- a/scala/scala-impl/src/org/jetbrains/plugins/scala/extensions/ParenthesizedElement.scala
+++ b/scala/scala-impl/src/org/jetbrains/plugins/scala/extensions/ParenthesizedElement.scala
@@ -199,10 +199,13 @@ object ParenthesizedElement {
     /*
      * Parenthesis here are not redundant
      * test { blub: (Int => Int) => ??? }
+     * case _: (String => String) =>  // SCL-21577
      */
     def unapply(p: ScParenthesisedTypeElement): Boolean =
-      p.innerElement.exists(_.is[ScFunctionalTypeElement]) &&
-        p.getParent.is[ScParameterType] &&
-        p.nextVisibleLeaf.exists(_.elementType == ScalaTokenTypes.tFUNTYPE)
+      p.innerElement.exists(_.is[ScFunctionalTypeElement]) && (
+        (p.getParent.is[ScParameterType] &&
+         p.nextVisibleLeaf.exists(_.elementType == ScalaTokenTypes.tFUNTYPE)) ||
+        p.getParent.is[ScTypePattern]
+      )
   }
 }
diff --git a/scala/scala-impl/test/org/jetbrains/plugins/scala/codeInspection/parentheses/ScalaUnnecessaryParenthesesInspectionTest.scala b/scala/scala-impl/test/org/jetbrains/plugins/scala/codeInspection/parentheses/ScalaUnnecessaryParenthesesInspectionTest.scala
index 7103017da1c..8b0b7144131 100644
--- a/scala/scala-impl/test/org/jetbrains/plugins/scala/codeInspection/parentheses/ScalaUnnecessaryParenthesesInspectionTest.scala
+++ b/scala/scala-impl/test/org/jetbrains/plugins/scala/codeInspection/parentheses/ScalaUnnecessaryParenthesesInspectionTest.scala
@@ -680,4 +680,15 @@ class ScalaUnnecessaryParenthesesInspectionTest_Scala3 extends ScalaUnnecessaryP
     checkTextHasErrors(s"val $START((x = _, y = _))$END = ???")
     checkTextHasErrors(s"val (x = _, y = $START(_)$END) = ???")
   }
+
+  def testSCL21577_FunctionTypeInPattern(): Unit = {
+    checkTextHasNoErrors(
+      """
+        |null match {
+        |  case _: (String => String) =>
+        |  case _ =>
+        |}
+      """.stripMargin
+    )
+  }
 }