1 files changed, 3 insertions, 0 deletions

diff --git a/shell/ash.c b/shell/ash.c
index 5195a8557..d9a4a8cfa 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -14489,6 +14489,9 @@ umaskcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
                 if (!isdigit(modestr[0]))
                         mask ^= 0777;
                 umask(mask);
+#if ENABLE_PLATFORM_MINGW32
+                setvareq(xasprintf("BB_UMASK=0%o", mask), VEXPORT|VNOSAVE);
+#endif
         }
         return 0;
 }