diff --git a/autogen.sh b/autogen.sh
index 6c6672c..35c8ee3 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -6,7 +6,7 @@ test -z "$srcdir" && srcdir=.
 
 PKG_NAME="zenity"
 
-(test -f $srcdir/configure.in \
+(test -f $srcdir/configure.ac \
   && test -f $srcdir/ChangeLog \
   && test -d $srcdir/src) || {
     echo -n "**Error**: Directory "\`$srcdir\'" does not look like the"