diff --git a/src/rgba.c b/src/rgba.c
index ce14dff..194a871 100644
--- a/src/rgba.c
+++ b/src/rgba.c
@@ -693,7 +693,7 @@ _r[0] = ((((src[0] >> 16) & 0xff) * 5) + _dith) >> 8; \
 _g[0] = ((((src[0] >> 8 ) & 0xff) * 5) + (262 - _dith)) >> 8; \
 _b[0] = ((((src[0]      ) & 0xff) * 5) + _dith) >> 8; \
  *((DATA8 *)dest) = \
-(_dither_color_lut[(_r[1] * 36) + (_g[1] * 6) + _b[1]])       \
+(_dither_color_lut[(_r[0] * 36) + (_g[0] * 6) + _b[0]])       \
 ; \
 dest += 1; src += 1; \
 }