diff --git a/cmd/mem.c b/cmd/mem.c
index d5d7ca2790b..8690fc1e4e6 100644
--- a/cmd/mem.c
+++ b/cmd/mem.c
@@ -26,6 +26,7 @@
 #include <mapmem.h>
 #include <rand.h>
 #include <time.h>
+#include <vsprintf.h>
 #include <watchdog.h>
 #include <asm/global_data.h>
 #include <asm/io.h>