diff --git a/eo/src/eoFunctorStore.cpp b/eo/src/eoFunctorStore.cpp
index 56f7b5d5..cb8d1a57 100644
--- a/eo/src/eoFunctorStore.cpp
+++ b/eo/src/eoFunctorStore.cpp
@@ -4,6 +4,7 @@
 #endif
 
 #include <eoFunctorStore.h>
+#include <eoFunctor.h>
 
 
 /// clears the memory