diff --git a/configure.ac b/configure.ac
index 8be9058..4fee0a4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -57,7 +57,7 @@ inputdir=${moduledir}/input
 AC_SUBST(inputdir)
 
 # Checks for pkg-config packages
-PKG_CHECK_MODULES(XORG, [xorg-server >= 1.9.99.1] xproto)
+PKG_CHECK_MODULES(XORG, [xorg-server >= 1.18] xproto)
 
 AC_CONFIG_FILES([Makefile
 		src/Makefile