diff --git a/client/src/cmdflashmem.c b/client/src/cmdflashmem.c
index 3489813ef..fbc8c1fc7 100644
--- a/client/src/cmdflashmem.c
+++ b/client/src/cmdflashmem.c
@@ -17,6 +17,7 @@
 //-----------------------------------------------------------------------------
 #include "cmdflashmem.h"
 #include <ctype.h>
+#include <string.h>
 #include "cmdparser.h"         // command_t
 #include "cliparser.h"
 #include "pmflash.h"           // rdv40validation_t