diff --git a/Source/trigs.h b/Source/trigs.h
index 2bcbc8649..95ce2ea61 100644
--- a/Source/trigs.h
+++ b/Source/trigs.h
@@ -9,6 +9,7 @@
 extern BOOL trigflag;
 extern int numtrigs;
 extern TriggerStruct trigs[MAXTRIGGERS];
+extern int TWarpFrom;
 
 void InitNoTriggers();
 void InitTownTriggers();