1 files changed, 6 insertions, 0 deletions

diff --git a/shell/ash.c b/shell/ash.c
index ef3f7933a..349e9deb8 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -13475,6 +13475,12 @@ init(void)
                                 for (start = *envp;start < end;start++)
                                         *start = toupper(*start);
 
+                                /* skip conversion of variables known to cause problems */
+                                if ( strncmp(*envp, "SYSTEMROOT=", 11) == 0 ||
+                                                strncmp(*envp, "COMSPEC=", 8) == 0 ) {
+                                        continue;
+                                }
+
                                 /* convert backslashes to forward slashes */
                                 if (!xp) {
                                         for ( ++end; *end; ++end ) {