diff --git a/similar/arch/sdl/timer.cpp b/similar/arch/sdl/timer.cpp
index d2e739b3b..622bdeb99 100644
--- a/similar/arch/sdl/timer.cpp
+++ b/similar/arch/sdl/timer.cpp
@@ -55,7 +55,8 @@ void timer_delay2(int fps)
 	while (FrameLoop < 1000u/(GameCfg.VSync?MAXIMUM_FPS:fps))
 	{
 		u_int32_t tv_now = SDL_GetTicks();
-		multi_do_frame(); // during long wait, keep packets flowing
+		if (Game_mode & GM_MULTI)
+			multi_do_frame(); // during long wait, keep packets flowing
 		if (FrameStart > tv_now)
 			FrameStart = tv_now;
 		if (!GameCfg.VSync)
diff --git a/similar/main/automap.cpp b/similar/main/automap.cpp
index 5ebe2c4a9..e988debeb 100644
--- a/similar/main/automap.cpp
+++ b/similar/main/automap.cpp
@@ -611,7 +611,8 @@ static void draw_automap(automap *am)
 	am->t2 = timer_query();
 	while (am->t2 - am->t1 < F1_0 / (GameCfg.VSync?MAXIMUM_FPS:GameArg.SysMaxFPS)) // ogl is fast enough that the automap can read the input too fast and you start to turn really slow.  So delay a bit (and free up some cpu :)
 	{
-		multi_do_frame(); // during long wait, keep packets flowing
+		if (Game_mode & GM_MULTI)
+			multi_do_frame(); // during long wait, keep packets flowing
 		if (!GameArg.SysNoNiceFPS && !GameCfg.VSync)
 			timer_delay(F1_0>>8);
 		timer_update();
diff --git a/similar/main/game.cpp b/similar/main/game.cpp
index 1d067def3..f1acb369b 100644
--- a/similar/main/game.cpp
+++ b/similar/main/game.cpp
@@ -404,7 +404,8 @@ void calc_frame_time()
 
 	while (FrameTime < f1_0 / (GameCfg.VSync?MAXIMUM_FPS:GameArg.SysMaxFPS))
 	{
-		multi_do_frame(); // during long wait, keep packets flowing
+		if (Game_mode & GM_MULTI)
+			multi_do_frame(); // during long wait, keep packets flowing
 		if (!GameArg.SysNoNiceFPS && !GameCfg.VSync)
 			timer_delay(F1_0>>8);
 		timer_update();