diff --git a/CMakeLists.txt b/CMakeLists.txt
index a8857e3..7142ffe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,7 +40,7 @@ configure_file (${PROJECT_SOURCE_DIR}/config.vala.in "${config_path}")
 # seems to be so that symbols are exported for GModule to see
 set (symbols_path "${PROJECT_BINARY_DIR}/${PROJECT_NAME}.def")
 
-set (project_VALA_SOURCES ${config_path} ${PROJECT_NAME}.vala xsync.vapi)
+set (project_VALA_SOURCES ${config_path} ${PROJECT_NAME}.vala xext.vapi)
 vala_precompile (${project_VALA_SOURCES}
 	OUTPUTS project_VALA_C
 	HEADER ${PROJECT_NAME}.h
diff --git a/wdmtg.vala b/wdmtg.vala
index 829d244..7158f58 100644
--- a/wdmtg.vala
+++ b/wdmtg.vala
@@ -16,7 +16,7 @@
 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 //
 // vim: set sw=2 ts=2 sts=2 et tw=80:
-// modules: x11 xsync  config
+// modules: x11 xext  config
 // vapidirs: . ../build build
 
 namespace Wdmtg {
diff --git a/xsync.vapi b/xext.vapi
similarity index 98%
rename from xsync.vapi
rename to xext.vapi
index 9e77b16..f78de6a 100644
--- a/xsync.vapi
+++ b/xext.vapi
@@ -1,5 +1,5 @@
 //
-// xsync.vapi: selected XSync APIs
+// xext.vapi: various extensions to the x11 vapi
 //
 // Copyright (c) 2016, Přemysl Janouch <p.janouch@gmail.com>
 //
@@ -18,7 +18,6 @@
 // vim: set sw=2 ts=2 sts=2 et tw=80:
 // modules: x11
 
-// TODO: move this outside, I didn't expect the Xlib binding to be this shitty
 namespace X {
   [CCode (cname = "XErrorHandler", has_target = false)]
   public delegate int ErrorHandler (Display dpy, ErrorEvent *ee);