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-rw-r--r--include/grp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/grp.h b/include/grp.h
index 8e2e1f20..b331d326 100644
--- a/include/grp.h
+++ b/include/grp.h
@@ -36,6 +36,7 @@ void           setgrent(void);
 
 #ifdef _GNU_SOURCE
 struct group  *fgetgrent(FILE *stream);
+int putgrent(const struct group *, FILE *);
 #endif
 
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)