diff --git a/engine/gl/gl_vidlinuxglx.c b/engine/gl/gl_vidlinuxglx.c
index a14038b9b..53ddf7be6 100644
--- a/engine/gl/gl_vidlinuxglx.c
+++ b/engine/gl/gl_vidlinuxglx.c
@@ -1081,3 +1081,9 @@ void GLVID_ForceLockState (int lk) {}
 void GLVID_HandlePause (qboolean pause) {}
 
 void GL_DoSwap(void) {}
+
+void GLVID_SetCaption(char *text)
+{
+	XStoreName(vid_dpy, vid_window, text);
+}
+
diff --git a/engine/sw/vid_x.c b/engine/sw/vid_x.c
index 6b8cd8b02..9e4a82392 100644
--- a/engine/sw/vid_x.c
+++ b/engine/sw/vid_x.c
@@ -1379,3 +1379,9 @@ void SWVID_ForceLockState (int lk)
 void SWVID_HandlePause (qboolean pause)
 {
 }
+
+void SWVID_SetCaption(char *text)
+{
+	XStoreName(vid_dpy, x_win, text);
+}
+