diff --git a/clang-tools-extra/clang-tidy/google/AvoidThrowingObjCExceptionCheck.cpp b/clang-tools-extra/clang-tidy/google/AvoidThrowingObjCExceptionCheck.cpp
index 791651fb6d6e0..aa91ff0cbfded 100644
--- a/clang-tools-extra/clang-tidy/google/AvoidThrowingObjCExceptionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/google/AvoidThrowingObjCExceptionCheck.cpp
@@ -19,6 +19,11 @@ namespace google {
 namespace objc {
 
 void AvoidThrowingObjCExceptionCheck::registerMatchers(MatchFinder *Finder) {
+  // this check should only be applied to ObjC sources.
+  if (!getLangOpts().ObjC1 && !getLangOpts().ObjC2) {
+    return;
+  }
+
   Finder->addMatcher(objcThrowStmt().bind("throwStmt"), this);
   Finder->addMatcher(
       objcMessageExpr(anyOf(hasSelector("raise:format:"),
diff --git a/clang-tools-extra/clang-tidy/objc/AvoidNSErrorInitCheck.cpp b/clang-tools-extra/clang-tidy/objc/AvoidNSErrorInitCheck.cpp
index d92414c1c1c0c..86c4656c1430c 100644
--- a/clang-tools-extra/clang-tidy/objc/AvoidNSErrorInitCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/AvoidNSErrorInitCheck.cpp
@@ -18,6 +18,10 @@ namespace tidy {
 namespace objc {
 
 void AvoidNSErrorInitCheck::registerMatchers(MatchFinder *Finder) {
+  // this check should only be applied to ObjC sources.
+  if (!getLangOpts().ObjC1 && !getLangOpts().ObjC2) {
+    return;
+  }
   Finder->addMatcher(objcMessageExpr(hasSelector("init"),
                                      hasReceiverType(asString("NSError *")))
                          .bind("nserrorInit"),
diff --git a/clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp b/clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp
index a8d79f5584498..e78cb995d32b3 100644
--- a/clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp
@@ -77,6 +77,10 @@ ForbiddenSubclassingCheck::ForbiddenSubclassingCheck(
 }
 
 void ForbiddenSubclassingCheck::registerMatchers(MatchFinder *Finder) {
+  // this check should only be applied to ObjC sources.
+  if (!getLangOpts().ObjC1 && !getLangOpts().ObjC2) {
+    return;
+  }
   Finder->addMatcher(
       objcInterfaceDecl(
           isSubclassOf(
diff --git a/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp b/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
index 700c5e63c09b0..7a3bbaf33539a 100644
--- a/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
@@ -170,6 +170,10 @@ PropertyDeclarationCheck::PropertyDeclarationCheck(StringRef Name,
       EscapedAcronyms() {}
 
 void PropertyDeclarationCheck::registerMatchers(MatchFinder *Finder) {
+  // this check should only be applied to ObjC sources.
+  if (!getLangOpts().ObjC1 && !getLangOpts().ObjC2) {
+    return;
+  }
   if (IncludeDefaultAcronyms) {
     EscapedAcronyms.reserve(llvm::array_lengthof(DefaultSpecialAcronyms) +
                             SpecialAcronyms.size());