diff --git a/src/conio/x_events.c b/src/conio/x_events.c
index adf0bd79bf787d7187d1fd4d30c37bfa608f0544..5a5ffa5095120bfa0d2af340c44a4f17f5cf7e2b 100644
--- a/src/conio/x_events.c
+++ b/src/conio/x_events.c
@@ -551,7 +551,7 @@ static int init_window()
     /* Create window, but defer setting a size and GC. */
 	XSetWindowAttributes wa = {0};
 	wincmap = x11.XCreateColormap(dpy, DefaultRootWindow(dpy), visual, AllocNone);
-	x11.InstallColormap(dpy, wincmap);
+	x11.XInstallColormap(dpy, wincmap);
 	wa.colormap = wincmap;
 	wa.background_pixel = black;
 	wa.border_pixel = black;