diff --git a/ESP32-C3_ePaper/src/main.cpp b/ESP32-C3_ePaper/src/main.cpp
index 871f0689a..05eb15310 100644
--- a/ESP32-C3_ePaper/src/main.cpp
+++ b/ESP32-C3_ePaper/src/main.cpp
@@ -19,7 +19,7 @@
 void loop();
 void setup();
 
-uint16_t tbx, tby; 
+int16_t tbx, tby; 
 uint16_t tbw, tbh;
 
 void setup() {