--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,6 @@ m4_define([xfce4_screenshooter_version_tag], [])
 m4_define([xfce4_screenshooter_version], [xfce4_screenshooter_version_major().xfce4_screenshooter_version_minor().xfce4_screenshooter_version_micro()ifelse(xfce4_screenshooter_version_nano(), [], [], [.xfce4_screenshooter_version_nano()])ifelse(xfce4_screenshooter_version_tag(), [git], [xfce4_screenshooter_version_tag()-xfce4_screenshooter_version_build()], [xfce4_screenshooter_version_tag()])])
 
 AC_INIT([xfce4-screenshooter], [xfce4_screenshooter_version], [http://bugzilla.xfce.org/], [xfce4-screenshooter])
-AC_USE_SYSTEM_EXTENSIONS()
 
 dnl ***************************
 dnl *** Initialize automake ***
@@ -47,6 +46,7 @@ dnl **********************************
 dnl *** Check for standard headers ***
 dnl **********************************
 AC_HEADER_STDC
+AC_USE_SYSTEM_EXTENSIONS()
 
 dnl ***********************************
 dnl *** Check for required packages ***