diff --git a/src/EC/Manager.hpp b/src/EC/Manager.hpp
index 38fb167..81f8ce7 100644
--- a/src/EC/Manager.hpp
+++ b/src/EC/Manager.hpp
@@ -10,6 +10,7 @@
 #define EC_GROW_SIZE_AMOUNT 256
 
 #include <cstddef>
+#include <vector>
 #include <tuple>
 #include <utility>