1 files changed, 3 insertions, 1 deletions

diff --git a/include/libbb.h b/include/libbb.h
index f50ae3604..0d6e3af7d 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -79,9 +79,11 @@
 # endif
 #endif
 
-/* Some libc's forget to declare these, help them */
+/* Some libc's forget to declare these, do it ourself */
 extern char **environ;
 
+/* Set the group set for the current user to GROUPS (N of them).  */
+int setgroups(size_t n, const gid_t *groups);
 #if defined(__GLIBC__) && __GLIBC__ < 2
 int vdprintf(int d, const char *format, va_list ap);
 #endif