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-rw-r--r--src/lib/formats/ap2_dsk.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/formats/ap2_dsk.c b/src/lib/formats/ap2_dsk.c
index 7be7150ad28..dc5931c1752 100644
--- a/src/lib/formats/ap2_dsk.c
+++ b/src/lib/formats/ap2_dsk.c
@@ -139,7 +139,7 @@ static FLOPPY_IDENTIFY(apple2_dsk_identify)
if (size == expected_size)
*vote = 100;
- else if (size - expected_size < 8 && size - expected_size > -8)
+ else if (abs(size - expected_size) < 8)
*vote = 90; /* tolerate images with up to eight fewer/extra bytes (bug #638) */
else
*vote = 0;