diff --git a/utils.lua b/utils.lua
--- a/utils.lua
+++ b/utils.lua
@@ -165,9 +165,12 @@ end);
 function npc(tab)
 	if (not tab.act) then
 		tab.act = function(s)
-			if (s.dlg) then
-                local dlg = EngineUtils.getValue(s.dlg, s);
-				walkin(dlg);
+            local dlg = nil;      
+			if s.dlg then
+                dlg = EngineUtils.getValue(s.dlg, s);
+		    end;
+            if dlg then
+                walkin(dlg);      
 			else
                 local phrases = EngineUtils.getValue(s.phrases, s);
 				return phrases[rnd(#phrases)];