1 files changed, 2 insertions, 2 deletions
diff --git a/src/itemdef.cpp b/src/itemdef.cpp
index a6c627a03..1aa6331dc 100644
--- a/src/itemdef.cpp
+++ b/src/itemdef.cpp
@@ -146,9 +146,9 @@ void ItemDefinition::serialize(std::ostream &os, u16 protocol_version) const
 	}
 	os<<serializeString(tool_capabilities_s);
 	writeU16(os, groups.size());
-	for(std::map<std::string, int>::const_iterator
+	for (ItemGroupList::const_iterator
 			i = groups.begin(); i != groups.end(); ++i){
-		os<<serializeString(i->first);
+		os << serializeString(i->first);
 		writeS16(os, i->second);
 	}
 	os<<serializeString(node_placement_prediction);