1 files changed, 1 insertions, 1 deletions

diff --git a/libpwdgrp/pwd_grp.c b/libpwdgrp/pwd_grp.c
index 01058d3a1..2392e7d22 100644
--- a/libpwdgrp/pwd_grp.c
+++ b/libpwdgrp/pwd_grp.c
@@ -223,7 +223,7 @@ static char *parse_common(FILE *fp, const char *filename,
  * for 3 pointers: alignment padding, group name, NULL.
  * +1 for every additional group.
  */
-        if (n_fields == sizeof(GR_DEF)-1) { /* if we read group file... */
+        if (buf && n_fields == sizeof(GR_DEF)-1) { /* if we read group file... */
                 int cnt = 3;
                 char *p = buf;
                 while (p < S.tokenize_end)