1 files changed, 2 insertions, 2 deletions

diff --git a/shell/ash.c b/shell/ash.c
index f9d59e50e..e24b74c03 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -14312,9 +14312,9 @@ procargs(char **argv)
         }
         if (mflag == 2)
                 mflag = iflag;
+        /* Unset options which weren't explicitly set or unset */
         for (i = 0; i < NOPTS; i++)
-                if (optlist[i] == 2)
-                        optlist[i] = 0;
+                optlist[i] &= 1; /* same effect as "if (optlist[i] == 2) optlist[i] = 0;" */
 #if DEBUG == 2
         debug = 1;
 #endif