diff --git a/client/client_msgs.C b/client/client_msgs.C
index 94ea89cc33..e396569977 100644
--- a/client/client_msgs.C
+++ b/client/client_msgs.C
@@ -23,6 +23,7 @@
 #include <cstring>
 #include <deque>
 #endif
+#include "str_util.h"
 
 using std::deque;