1 files changed, 4 insertions, 0 deletions

diff --git a/win32/env.c b/win32/env.c
index 4d4e9c8fd..8e54c4c5e 100644
--- a/win32/env.c
+++ b/win32/env.c
@@ -100,6 +100,10 @@ int mingw_putenv(const char *env)
                                 break;
                         }
                 }
+
+                /* tell the OS environment about the change */
+                envstr[s - env] = '\0';
+                SetEnvironmentVariable(envstr, "");
                 free(envstr);
         }