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-rw-r--r--include/unistd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/unistd.h b/include/unistd.h
index e4e3ac59..7f2dd687 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -168,6 +168,7 @@ char *getusershell(void);
 #endif
 
 #ifdef _GNU_SOURCE
+extern char **environ;
 int setresuid(uid_t, uid_t, uid_t);
 int setresgid(gid_t, gid_t, gid_t);
 int getresuid(uid_t *, uid_t *, uid_t *);