diff --git a/src/other/pbsh.s b/src/other/pbsh.s
index 1bb0038..989a3b6 100644
--- a/src/other/pbsh.s
+++ b/src/other/pbsh.s
@@ -254,7 +254,7 @@ changedir:
    skp
 1:  lac 0f			" increment argvp
    tad d4
-   sad 0f
+   dac 0f
    -4				" decrement argc
    tad argc
    dac argc