diff --git a/platform-independent/cli-c/cli/mpw-cli-util.c b/platform-independent/cli-c/cli/mpw-cli-util.c
index 3f5345d0..8881d07d 100644
--- a/platform-independent/cli-c/cli/mpw-cli-util.c
+++ b/platform-independent/cli-c/cli/mpw-cli-util.c
@@ -20,6 +20,7 @@
 
 #include <unistd.h>
 #include <sys/stat.h>
+#include <sys/wait.h>
 #include <pwd.h>
 #include <string.h>
 #include <errno.h>