diff --git a/src/fix_adapt.cpp b/src/fix_adapt.cpp
index 2852018aba..9f63f0172b 100644
--- a/src/fix_adapt.cpp
+++ b/src/fix_adapt.cpp
@@ -16,6 +16,8 @@
 #include "stdlib.h"
 #include "fix_adapt.h"
 #include "atom.h"
+#include "update.h"
+#include "modify.h"
 #include "force.h"
 #include "pair.h"
 #include "input.h"