diff --git a/src/keyboard/controller.c b/src/keyboard/controller.c
index 2d840f0..8462676 100644
--- a/src/keyboard/controller.c
+++ b/src/keyboard/controller.c
@@ -1310,7 +1310,7 @@ void usb_debug_printf(const char *fmt, ...) {
 
   va_list args;
   va_start(args, fmt);
-  vsnprintf(buf, sizeof(buf), fmt, args);
+  vsnprintf_P(buf, sizeof(buf), fmt, args);
   va_end(args);
 
   for (int i = 0; i < sizeof(buf); i++) {
@@ -1323,8 +1323,8 @@ void usb_debug_printf(const char *fmt, ...) {
 #endif
 
 #ifdef KBD_DEBUG
-#define debug_print(s)       	usb_debug_print(PSTR(s))
-#define debug_printf(args...)	usb_debug_printf(args)
+#define debug_print(s)          	usb_debug_print(PSTR(s))
+#define debug_printf(s, args...)	usb_debug_printf(PSTR(s), args)
 #else
 #define debug_print(s)
 #define debug_printf(...)