diff --git a/configure.in b/configure.ac
similarity index 99%
rename from configure.in
rename to configure.ac
index a93ae63..26a3433 100644
--- a/configure.in
+++ b/configure.ac
@@ -3,7 +3,7 @@ dnl Process this file with autoconf to produce a configure script.
 # get rid of that stupid cache mechanism
 rm -f config.cache
 
-AC_INIT(configure.in)
+AC_INIT(configure.ac)
 AM_INIT_AUTOMAKE(ephoto, 3.15.0)
 AM_CONFIG_HEADER(src/bin/config.h)