diff --git a/src/apple2.dd.c b/src/apple2.dd.c
index 6accdc9..82fb81f 100644
--- a/src/apple2.dd.c
+++ b/src/apple2.dd.c
@@ -396,7 +396,7 @@ apple2_dd_shift(apple2dd *drive, int pos)
 
     drive->sector_pos += pos;
 
-    if (drive->sector_pos > ENC_ETRACK) {
+    if (drive->sector_pos >= ENC_ETRACK) {
         // We need to reset the sector pos to zero, because...
         drive->sector_pos = 0;
     }