diff --git a/src/openac/build.c b/src/openac/build.c
index 1a9abd557..97a781068 100644
--- a/src/openac/build.c
+++ b/src/openac/build.c
@@ -12,6 +12,8 @@
  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * for more details.
+ *
+ * RCSID $Id$
  */
 
 #include <stdlib.h>
diff --git a/src/openac/build.h b/src/openac/build.h
index 1fc4f3105..66ec86213 100644
--- a/src/openac/build.h
+++ b/src/openac/build.h
@@ -12,6 +12,8 @@
  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * for more details.
+ *
+ * RCSID $Id$
  */
 
 #ifndef _BUILD_H
diff --git a/src/openac/openac.c b/src/openac/openac.c
index cde6ba3be..6fae455db 100755
--- a/src/openac/openac.c
+++ b/src/openac/openac.c
@@ -19,6 +19,8 @@
  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * for more details.
+ *
+ * RCSID $Id$
  */
 
 #include <stdio.h>