diff --git a/clang/include/clang/Analysis/Analyses/FormatString.h b/clang/include/clang/Analysis/Analyses/FormatString.h
index ce66fcf2123f..461ac921328e 100644
--- a/clang/include/clang/Analysis/Analyses/FormatString.h
+++ b/clang/include/clang/Analysis/Analyses/FormatString.h
@@ -67,7 +67,7 @@ public:
     AsShort,      // 'h'
     AsLong,       // 'l'
     AsLongLong,   // 'll'
-    AsQuad,       // 'q' (BSD, deprecated, same as 'll')
+    AsQuad,       // 'q' (BSD, deprecated, same as PRI?64)
     AsIntMax,     // 'j'
     AsSizeT,      // 'z'
     AsPtrDiff,    // 't'