diff --git a/include/boost/mpl/remove_if.hpp b/include/boost/mpl/remove_if.hpp
index 5b0882b..391e78d 100644
--- a/include/boost/mpl/remove_if.hpp
+++ b/include/boost/mpl/remove_if.hpp
@@ -25,6 +25,7 @@
 #include "boost/mpl/identity.hpp"
 #include "boost/mpl/protect.hpp"
 #include "boost/mpl/lambda.hpp"
+#include "boost/mpl/apply.hpp"
 #include "boost/mpl/aux_/void_spec.hpp"
 
 namespace boost {