diff --git a/wadsrc/static/zscript/engine/screenjob.zs b/wadsrc/static/zscript/engine/screenjob.zs
index e3fdc044d..a339def91 100644
--- a/wadsrc/static/zscript/engine/screenjob.zs
+++ b/wadsrc/static/zscript/engine/screenjob.zs
@@ -371,7 +371,7 @@ class ScreenJobRunner : Object UI
 
 	bool CanWipe()
 	{
-		if (index < jobs.Size()) return !jobs[index].nowipe;
+		if (index < jobs.Size()) return !jobs[max(0, index)].nowipe;
 		return true;		
 	}