diff --git a/stm-firmware/shell.c b/stm-firmware/shell.c
index 1c115d5..b10f878 100644
--- a/stm-firmware/shell.c
+++ b/stm-firmware/shell.c
@@ -48,7 +48,7 @@
 extern struct stm_uart shell_uart;
 static shellmatta_instance_t shell;
 static char shell_buffer[512];
-static char IN_SECTION(.ccm.bss) history_buffer[600];
+static char IN_SECTION(.ccm.bss) history_buffer[512];
 
 static bool check_opt(const char *args, uint32_t len, const char *opt_to_check)
 {