diff --git a/include/crucible/progress.h b/include/crucible/progress.h
index fa71da3..d2f752c 100644
--- a/include/crucible/progress.h
+++ b/include/crucible/progress.h
@@ -13,7 +13,7 @@ namespace crucible {
 
 	template <class T>
 	class ProgressTracker {
-		class ProgressTrackerState;
+		struct ProgressTrackerState;
 		class ProgressHolderState;
 	public:
 		using value_type = T;
diff --git a/src/bees.h b/src/bees.h
index 0c88c31..5e62f36 100644
--- a/src/bees.h
+++ b/src/bees.h
@@ -173,7 +173,7 @@ public:
 	T at(string idx) const;
 
 friend ostream& operator<< <>(ostream &os, const BeesStatTmpl<T> &bs);
-friend class BeesStats;
+friend struct BeesStats;
 };
 
 using BeesRates = BeesStatTmpl<double>;