diff --git a/src/lcd.cpp b/src/lcd.cpp
index 926b74789..4b0bfa1b7 100644
--- a/src/lcd.cpp
+++ b/src/lcd.cpp
@@ -393,7 +393,7 @@ void lcd_vlineStip(uint8_t x, int8_t y, int8_t h, uint8_t pat)
     p += DISPLAY_W;
     h -= 8;
   }
-  h = (h+8) % 8; // TODO optim
+  if (h < 0) h += 8;
   if (h) {
     p -= DISPLAY_W;
     assert(p >= displayBuf && p < DISPLAY_END);