diff --git a/main_gui.c b/main_gui.c
index a7a8adef45..a281b31539 100644
--- a/main_gui.c
+++ b/main_gui.c
@@ -1654,6 +1654,9 @@ static void MainToolbarWndProc(Window *w, WindowEvent *e)
 		GfxFillRect(0, 0, w->width-1, w->height-1, 0xB2);
 		GfxFillRect(0, 0, w->width-1, w->height-1, 0x80B4);
 
+		// if networking, disable fast-forward button
+		if (_networking) w->disabled_state |= (1 << 1);
+
 		// if spectator, disable things
 		if (_current_player == OWNER_SPECTATOR){
 			w->disabled_state |= (1 << 0) | (1 << 19) | (1<<20) | (1<<21) | (1<<22) | (1<<23);
diff --git a/sdl.c b/sdl.c
index 56c16add29..ad8bc63637 100644
--- a/sdl.c
+++ b/sdl.c
@@ -542,7 +542,7 @@ static int SdlVideoMainLoop()
 #else
 		if (keys[SDLK_TAB]) {
 #endif
-			_fast_forward |= 2;
+			if (!_networking) _fast_forward |= 2;
 		} else if (_fast_forward&2) {
 			_fast_forward = 0;
 		}
diff --git a/win32.c b/win32.c
index 545dcdb74c..dc1a6a5095 100644
--- a/win32.c
+++ b/win32.c
@@ -672,7 +672,7 @@ static int Win32GdiMainLoop()
 #else
 		if (_wnd.has_focus && GetAsyncKeyState(VK_TAB) < 0) {
 #endif
-			_fast_forward |= 2;
+			if (!_networking) _fast_forward |= 2;
 		} else if (_fast_forward&2) {
 			_fast_forward = 0;
 		}