diff -r 9d44e8794a9b src/video/x11/SDL_x11events.c
--- a/src/video/x11/SDL_x11events.c	Sun Jul 19 19:56:16 2015 -0300
+++ b/src/video/x11/SDL_x11events.c	Thu Jul 23 01:33:26 2015 +0900
@@ -679,6 +679,9 @@
 #endif
             SDL_SetMouseFocus(data->window);
 
+            SDL_GetMouse()->last_x = xevent.xcrossing.x;
+            SDL_GetMouse()->last_y = xevent.xcrossing.y;
+
             if (!SDL_GetMouse()->relative_mode) {
                 SDL_SendMouseMotion(data->window, 0, 0, xevent.xcrossing.x, xevent.xcrossing.y);
             }