diff --git a/src/update.cpp b/src/update.cpp
index 1ac25170d9..f194efb926 100644
--- a/src/update.cpp
+++ b/src/update.cpp
@@ -15,6 +15,8 @@
 #include "string.h"
 #include "stdlib.h"
 #include "update.h"
+#include "integrate.h"
+#include "min.h"
 #include "style_integrate.h"
 #include "style_minimize.h"
 #include "neighbor.h"