diff --git a/src/USER-PLUMED/fix_plumed.cpp b/src/USER-PLUMED/fix_plumed.cpp
index feb12716b805978154ffbb2d8b0c1909e5dc3111..8ab2decbf8d1d5c779e74c732f30def61ef1a8f3 100644
--- a/src/USER-PLUMED/fix_plumed.cpp
+++ b/src/USER-PLUMED/fix_plumed.cpp
@@ -20,6 +20,7 @@
 #include <cstring>
 
 #include "atom.h"
+#include "comm.h"
 #include "update.h"
 #include "force.h"
 #include "respa.h"