diff --git a/src/include/console/cbmem_console.h b/src/include/console/cbmem_console.h
index 9e2f14e715..69332aa937 100644
--- a/src/include/console/cbmem_console.h
+++ b/src/include/console/cbmem_console.h
@@ -26,7 +26,7 @@ void cbmemc_tx_byte(unsigned char data);
 #else
 #define cbmemc_init()
 #define cbmemc_reinit()
-#define cbmemc_tx_byte()
+#define cbmemc_tx_byte(x)
 #endif
 
 #endif