diff --git a/src/symtab.c b/src/symtab.c
index 0f2925ad..ab8d7bcc 100644
--- a/src/symtab.c
+++ b/src/symtab.c
@@ -284,7 +284,7 @@ symbol_print (symbol const *s, FILE *f)
 static bool
 is_identifier (uniqstr s)
 {
-  static char const alphanum[26 + 26 + 1 + 10] =
+  static char const alphanum[26 + 26 + 1 + 10] ATTRIBUTE_NONSTRING =
     "abcdefghijklmnopqrstuvwxyz"
     "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
     "_"