diff --git a/configure.ac b/configure.ac
index 062c0cb..c3d3595 100644
--- a/configure.ac
+++ b/configure.ac
@@ -131,8 +131,6 @@ XCB_EXTENSION(SELinux, "no")
 XCB_EXTENSION(XTest, "yes")
 XCB_EXTENSION(Xv, "yes")
 XCB_EXTENSION(XvMC, "yes")
-XCB_EXTENSION(Composite, "yes")
-XCB_EXTENSION(Composite, "yes")
 
 
 AC_CONFIG_FILES([