diff --git a/client/src/cmdhw.c b/client/src/cmdhw.c
index 35d70914d..5a76a7b68 100644
--- a/client/src/cmdhw.c
+++ b/client/src/cmdhw.c
@@ -52,8 +52,6 @@
 
 #include "lua.h"
 
-size_t pm3_max_cmd_data_size(void);
-
 static int CmdHelp(const char *Cmd);
 
 static void lookup_chipid_short(uint32_t iChipID, uint32_t mem_used, uint32_t flash_size) {