diff --git a/configure.in b/configure.ac
similarity index 100%
rename from configure.in
rename to configure.ac
diff --git a/src/config.h.in b/src/config.h.in
index a2ccc00d..979eb530 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -1,4 +1,4 @@
-/* src/config.h.in.  Generated from configure.in by autoheader.  */
+/* src/config.h.in.  Generated from configure.ac by autoheader.  */
 
 /* Configuration command used to build Remind */
 #undef CONFIG_CMD