2 files changed, 5 insertions, 2 deletions
diff --git a/src/su.c b/src/su.c
index 6bee0cb59..303a3c67d 100644
--- a/src/su.c
+++ b/src/su.c
@@ -118,8 +118,11 @@ uid_t getuid ();
 #endif
 #endif /* not _POSIX_VERSION */
 
-#ifdef _POSIX_SOURCE
+#ifndef HAVE_ENDGRENT
 #define endgrent()
+#endif
+
+#ifndef HAVE_ENDPWENT
 #define endpwent()
 #endif
 
diff --git a/src/who.c b/src/who.c
index 5ded20f75..c2f6e20ab 100644
--- a/src/who.c
+++ b/src/who.c
@@ -56,7 +56,7 @@
 
 #include <time.h>
 #include <getopt.h>
-#ifndef _POSIX_SOURCE
+#ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif