1 files changed, 1 insertions, 1 deletions
diff --git a/js/src/vm/RegExpObject.cpp b/js/src/vm/RegExpObject.cpp
index 1d88754084..88a4ed72e2 100644
--- a/js/src/vm/RegExpObject.cpp
+++ b/js/src/vm/RegExpObject.cpp
@@ -1513,7 +1513,7 @@ ParseRegExpFlags(const CharT* chars, size_t length, RegExpFlag* flagsOut, char16
                     return false;
                 break;
             }
-            MOZ_FALLTHROUGH;
+            [[fallthrough]];
           default:
             return false;
         }