diff --git a/headers/libs/freetype2/freetype/config/ftconfig.h b/headers/libs/freetype2/freetype/config/ftconfig.h
index 1aa009e6ec..3c0b8b1641 100644
--- a/headers/libs/freetype2/freetype/config/ftconfig.h
+++ b/headers/libs/freetype2/freetype/config/ftconfig.h
@@ -359,7 +359,7 @@ FT_BEGIN_HEADER
       "addl  %%edx, %%eax\n"
       : "=a"(result), "=d"(b)
       : "a"(a), "d"(b)
-      : "%ecx" );
+      : "%ecx", "cc" );
     return result;
   }