diff --git a/configure.ac b/configure.ac
index 6e0d97c..4686f21 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,7 +47,8 @@ AC_SUBST(xcbincludedir)
 pkgconfigdir='${libdir}/pkgconfig'
 AC_SUBST(pkgconfigdir)
 
-PKG_CHECK_MODULES(XCB, xcb > 1.2)
+PKG_CHECK_MODULES(XCB, xcb >= 1.2)
+PKG_CHECK_MODULES(XCB_PROTO, xcb-proto >= 1.5)
 PKG_CHECK_MODULES(XCB_SHM, xcb-shm)
 PKG_CHECK_MODULES(XCB_RENDER, xcb-render)
 PKG_CHECK_MODULES(XPROTO, xproto >= 7.0.8)