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-rw-r--r--ext/posix/posix.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/posix/posix.c b/ext/posix/posix.c
index 685d4e3942..4c7d90d58d 100644
--- a/ext/posix/posix.c
+++ b/ext/posix/posix.c
@@ -667,7 +667,7 @@ PHP_FUNCTION(posix_uname)
add_assoc_string(return_value, "version", u.version, 1);
add_assoc_string(return_value, "machine", u.machine, 1);
-#if defined(_GNU_SOURCE) && !defined(DARWIN)
+#if defined(_GNU_SOURCE) && !defined(DARWIN) && defined(HAVE_UTSNAME_DOMAINNAME)
add_assoc_string(return_value, "domainname", u.domainname, 1);
#endif
}