diff --git a/ElunaUtility.h b/ElunaUtility.h
index 370c058..726ae6e 100644
--- a/ElunaUtility.h
+++ b/ElunaUtility.h
@@ -58,9 +58,11 @@ typedef QueryNamedResult ElunaQuery;
 #endif
 
 #ifndef UNORDERED_MAP
+#include <unordered_map>
 #define UNORDERED_MAP std::unordered_map
 #endif
 #ifndef UNORDERED_SET
+#include <unordered_set>
 #define UNORDERED_SET std::unordered_set
 #endif