--- a/lib/base64.c
+++ b/lib/base64.c
@@ -61,7 +61,7 @@
   return ch;
 }

-static const char b64c[64] =
+static const char b64c[64] _GL_ATTRIBUTE_NONSTRING =
   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

 /* Base64 encode IN array of size INLEN into OUT array. OUT needs
