diff --git a/libexec/rpc.rstatd/rstat_proc.c b/libexec/rpc.rstatd/rstat_proc.c
index 2ddb90f7a785..f673ab915b99 100644
--- a/libexec/rpc.rstatd/rstat_proc.c
+++ b/libexec/rpc.rstatd/rstat_proc.c
@@ -46,6 +46,7 @@ static const char rcsid[] =
 #include <sys/socket.h>
 #include <sys/sysctl.h>
 #include <sys/time.h>
+#include <sys/resource.h>
 #include <sys/vmmeter.h>
 #include <sys/param.h>