diff --git a/src/modules/_Crypto/include/RCSID.h b/src/modules/_Crypto/include/RCSID.h
index 1cb936510065e16c2e8ee5f2fe1098efdabc9212..4527ef36084f785b38891383473d5e9c8880cfd8 100644
--- a/src/modules/_Crypto/include/RCSID.h
+++ b/src/modules/_Crypto/include/RCSID.h
@@ -7,6 +7,7 @@
 #define RCSID2(name, X) \
  static char *name __attribute__ ((unused)) =X
 #elif __GNUC__ == 2
+ /* No need for PIKE_CONCAT() here since gcc supports ## */
 #define RCSID2(name, X) \
  static char *name = X; \
  static void *use_##name=(&use_##name, (void *)&name)