diff --git a/src/video/SDL_draw.h b/src/video/SDL_draw.h
index b1ae34008a21c400cc14c4be83a2335fb36e0bee..27165c6633d99d86f7fc9a0b9cc7950d5bbaf329 100644
--- a/src/video/SDL_draw.h
+++ b/src/video/SDL_draw.h
@@ -325,7 +325,7 @@ do { \
     x = x1; \
     y = y1; \
  \
-    for (i = 1; i < numpixels; ++i) { \
+    for (i = 0; i < numpixels; ++i) { \
         op(x, y); \
         if (d < 0) { \
             d += dinc1; \