diff --git a/util.h b/util.h
index beaa2b0..b45278f 100644
--- a/util.h
+++ b/util.h
@@ -50,6 +50,8 @@
     printf ("\n");							\
   } while (0)
 # endif /* HAVE_SECURITY__PAM_MACROS_H */
+#else
+# define D(x)
 #endif /* DEBUG_PAM */
 
 int get_user_cfgfile_path(const char *common_path, const char *filename, const char *username, char **fn);