diff --git a/main/lib/image/image.c b/main/lib/image/image.c
index 8152810e1..507182feb 100644
--- a/main/lib/image/image.c
+++ b/main/lib/image/image.c
@@ -1096,9 +1096,9 @@ void IMAGE_compose(GB_IMG *dst, int dx, int dy, int dw, int dh, GB_IMG *src, int
 						d[0] = ((s[0] - d[0]) * a) / 256 + d[0];
 						d[1] = ((s[1] - d[1]) * a) / 256 + d[1];
 						d[2] = ((s[2] - d[2]) * a) / 256 + d[2];
-						if (d[3] < a)
+						if (d[3] > a)
 							d[3] = a;
-				}
+					}
 					d += 4;
 					s += 4;
 				}