diff --git a/src/other/pbsh.s b/src/other/pbsh.s
index 9d0aab4..b10343f 100644
--- a/src/other/pbsh.s
+++ b/src/other/pbsh.s
@@ -52,19 +52,17 @@
 " argptr, and copy the names up).
 maxargs=10
 
-   lac d1
-   sys intrp			" make shell uninterruptable
-
 " see if reading from a special file
-   cla; sys seek; 1; 0		" try seeking stdin forward
+   cla; sys seek; 1; 0		" try seeking stdin forward one word
    sna				" new offset non-zero?
     jmp 1f			"  no: input is a special file (ttyin,keyboard)
    dzm prompt			" yes: regular file, kill prompt
    cla; sys seek; 0; 0		" seek file back to start
    jmp newline
 
-" stdin is a special file, see if superuser
-1: sys getuid
+1: lac d1
+   sys intrp			" make shell uninterruptable
+   sys getuid
    sma				" <0?
     jmp newline			"  no
    lac hash			" yes: superuser