diff --git a/src/LiquidCrystal.h b/src/LiquidCrystal.h
index 1c0fa4f..684a65f 100644
--- a/src/LiquidCrystal.h
+++ b/src/LiquidCrystal.h
@@ -102,7 +102,7 @@ private:
   uint8_t _initialized;
 
   uint8_t _numlines,_currline;
-  int _row_offsets[4];
+  uint8_t _row_offsets[4];
 };
 
 #endif