diff --git a/Tactical/Item Types.cpp b/Tactical/Item Types.cpp
index de7478ad..e8a7c848 100644
--- a/Tactical/Item Types.cpp	
+++ b/Tactical/Item Types.cpp	
@@ -592,7 +592,7 @@ LBENODE* OBJECTTYPE::GetLBEPointer(unsigned int index)
 	
 }
 
-bool OBJECTTYPE::exists()
+bool OBJECTTYPE::exists() const
 {
 	return(this && ubNumberOfObjects && usItem);
 }
diff --git a/Tactical/Item Types.h b/Tactical/Item Types.h
index cdd3d2a1..4fbfb650 100644
--- a/Tactical/Item Types.h	
+++ b/Tactical/Item Types.h	
@@ -546,7 +546,7 @@ public:
 
 	bool	operator==(OBJECTTYPE& compare);
 	bool	operator==(const OBJECTTYPE& compare)const;
-	bool	exists();
+	bool	exists() const;
 	bool	IsActiveLBE(unsigned int index);
 	bool	HasAnyActiveLBEs(SOLDIERTYPE * pSoldier = NULL, UINT8 iter = 0);
 	LBENODE*	GetLBEPointer(unsigned int index);