diff --git a/src/gui/stages_panel.cpp b/src/gui/stages_panel.cpp
index 6c3682b..8bf0b29 100644
--- a/src/gui/stages_panel.cpp
+++ b/src/gui/stages_panel.cpp
@@ -498,7 +498,7 @@ bool StagesPanel::HasDuplicateInternalName(const std::string &name,
 
 		const Starpounds::WeightStage &stage = m_stages.at(selection);
 
-		for (const Starpounds::WeightStageSub sub : stage.GetSubs()) {
+		for (const Starpounds::WeightStageSub &sub : stage.GetSubs()) {
 			if (sub.GetName() == name)
 				return true;
 		}
diff --git a/src/speciesgen.cpp b/src/speciesgen.cpp
index 6f16bbf..68458ee 100644
--- a/src/speciesgen.cpp
+++ b/src/speciesgen.cpp
@@ -393,7 +393,7 @@ void Frame::DoGenerateMod(wxCommandEvent &WXUNUSED(event)) {
 	const Starbound::Item::Frames femaleFrames("chestf.png", "bsleevef.png",
 											   "fsleevef.png");
 
-	for (Starpounds::WeightStage stage : stages) {
+	for (const Starpounds::WeightStage &stage : stages) {
 		const std::string baseShortDescription =
 			(stage.GetFriendlyName().empty()
 				 ? friendlySpecies