diff --git a/firmware/applications/schneider.c b/firmware/applications/schneider.c
index 27ace29..cf7c3e4 100644
--- a/firmware/applications/schneider.c
+++ b/firmware/applications/schneider.c
@@ -123,7 +123,7 @@ void dump_encoded(int len, uint8_t *data)
         }
         buf[j++] = data[i];
     }
-    CDC_WrInBuf(buf, j);
+    CDC_WrInBuf((char*)buf, &j);
 }
 
 void tick_schneider(void){