diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 8a1e247463d507..8f40fc7bdcb613 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -1047,7 +1047,7 @@ class AnnotatingParser {
                        Keywords.kw___has_include_next)) {
         parseHasInclude();
       }
-      if (Tok->is(Keywords.kw_where) && Tok->Next &&
+      if (Style.isCSharp() && Tok->is(Keywords.kw_where) && Tok->Next &&
           Tok->Next->isNot(tok::l_paren)) {
         Tok->Type = TT_CSharpGenericTypeConstraint;
         parseCSharpGenericTypeConstraint();
diff --git a/clang/unittests/Format/FormatTestCSharp.cpp b/clang/unittests/Format/FormatTestCSharp.cpp
index 17b8e070c36a54..f5e0bab1cb3113 100644
--- a/clang/unittests/Format/FormatTestCSharp.cpp
+++ b/clang/unittests/Format/FormatTestCSharp.cpp
@@ -709,6 +709,14 @@ class ItemFactory<T>
               IAnotherInterface<T>,
               IAnotherInterfaceStill<T> {})",
                Style);
+
+  // In other languages `where` can be used as a normal identifier.
+  // This example is in C++!
+  verifyFormat(R"(//
+class A {
+  int f(int where) {}
+};)",
+               getGoogleStyle(FormatStyle::LK_Cpp));
 }
 
 } // namespace format