diff --git a/cmd/diag.c b/cmd/diag.c
index c6da5aa..f51536d 100644
--- a/cmd/diag.c
+++ b/cmd/diag.c
@@ -7,6 +7,7 @@
 /*
  * Diagnostics support
  */
+#include <common.h>
 #include <command.h>
 #include <post.h>