diff --git a/src/buttonsinterface.h b/src/buttonsinterface.h
index 10416d8..05ad540 100644
--- a/src/buttonsinterface.h
+++ b/src/buttonsinterface.h
@@ -2,6 +2,7 @@
 
 //system includes
 #include <cstdint>
+#include <string>
 
 namespace espgui {