diff --git a/src/main.cpp b/src/main.cpp
index 98bbdd7d..6dcc5f97 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -70,7 +70,7 @@ extern "C" int CFG_TUSB_DEBUG_PRINTF(const char *format, ...)
 {
     va_list args;
     va_start(args, format);
-    vprintf(format, args);
+    usb64_vprintf(format, args);
     return 1;
 }
 #endif