diff --git a/src/p_tick.c b/src/p_tick.c
index 3e1e2bb1c..9f0b33da7 100644
--- a/src/p_tick.c
+++ b/src/p_tick.c
@@ -1081,7 +1081,8 @@ void P_Ticker(boolean run)
 			ACS_RunPositionScript();
 		}
 
-		if (timelimitintics > 0 && leveltime == (timelimitintics + starttime + 1))
+		if ((gametyperules & GTR_OVERTIME) && !battleprisons &&
+			timelimitintics > 0 && leveltime == (timelimitintics + starttime + 1))
 		{
 			ACS_RunOvertimeScript();
 		}