diff --git a/avr/usbload/debug.c b/avr/usbload/debug.c
index 9a25ad7..ccd26f3 100644
--- a/avr/usbload/debug.c
+++ b/avr/usbload/debug.c
@@ -59,10 +59,11 @@ void debug_P(int level, PGM_P format, ...) {
     va_list args;
     if (!(debug_level & level))
         return;
-    strlcpy_P(buffer_debug,format,FORMAT_BUFFER_LEN);
+    strlcpy_P((char*)buffer_debug,format,FORMAT_BUFFER_LEN);
     va_start(args, format);
-    vprintf(buffer_debug, args);
+    vprintf((char*)buffer_debug, args);
     va_end(args);
 #endif
 }
-#endif 
\ No newline at end of file
+#endif 
+
diff --git a/avr/usbload/info.c b/avr/usbload/info.c
index bcfc7b8..63a97ec 100644
--- a/avr/usbload/info.c
+++ b/avr/usbload/info.c
@@ -63,10 +63,10 @@ void info_P(PGM_P format, ...) {
 #ifdef NO_INFO
 
 #else
-    strlcpy_P(buffer_info,format,FORMAT_BUFFER_LEN);
+    strlcpy_P((char*)buffer_info,format,FORMAT_BUFFER_LEN);
     va_list args;
     va_start(args, format);
-    vprintf(buffer_info, args);
+    vprintf((char*)buffer_info, args);
     va_end(args);
 #endif
 }