diff --git a/src/image.c b/src/image.c
index 4e402bc..a8092ba 100644
--- a/src/image.c
+++ b/src/image.c
@@ -116,8 +116,8 @@ static inline void bitmap_read(uint8_t *buf,
                                uint8_t *r, uint8_t *g, uint8_t *b,
                                int channels) {
     *r = bitmap_read_channel(buf, x, y, stride, channels, 0);
-    *r = bitmap_read_channel(buf, x, y, stride, channels, 1);
-    *r = bitmap_read_channel(buf, x, y, stride, channels, 2);
+    *g = bitmap_read_channel(buf, x, y, stride, channels, 1);
+    *b = bitmap_read_channel(buf, x, y, stride, channels, 2);
 }
 
 static inline void bitmap_write_channel(uint8_t *buf,