1 files changed, 3 insertions, 0 deletions
diff --git a/ctype/Versions b/ctype/Versions
index f77b5be5b3..8cf0338b39 100644
--- a/ctype/Versions
+++ b/ctype/Versions
@@ -17,5 +17,8 @@ libc {
   }
   GLIBC_2.3 {
     isctype; __isctype;
+
+    # functions used by optimized macros in ctype.h
+    __ctype_b_loc; __ctype_tolower_loc; __ctype_toupper_loc;
   }
 }