diff --git a/core/HalfLife2.cpp b/core/HalfLife2.cpp
index fe884dbb..5ee447e6 100644
--- a/core/HalfLife2.cpp
+++ b/core/HalfLife2.cpp
@@ -832,7 +832,7 @@ cell_t CHalfLife2::EntityToReference(CBaseEntity *pEntity)
 
 CBaseEntity *CHalfLife2::ReferenceToEntity(cell_t entRef)
 {
-	if (entRef == INVALID_EHANDLE_INDEX)
+	if ((unsigned)entRef == INVALID_EHANDLE_INDEX)
 	{
 		return NULL;
 	}