diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 518210d0447..335942827f2 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,11 @@
+2017-05-19  Janne Blomqvist  <jb@gcc.gnu.org>
+
+	Backport from trunk
+	* libgfortran.h: HAVE_SECURE_GETENV: Don't check
+	HAVE___SECURE_GETENV.
+	* environ/runtime.c (secure_getenv): Use __secure_getenv via a
+        weak reference.
+
 2017-01-31  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/79305
diff --git a/libgfortran/libgfortran.h b/libgfortran/libgfortran.h
index 79f0d61c8e5..ef88eee4ada 100644
--- a/libgfortran/libgfortran.h
+++ b/libgfortran/libgfortran.h
@@ -801,9 +801,7 @@ internal_proto(get_unformatted_convert);
 
 /* Secure getenv() which returns NULL if running as SUID/SGID.  */
 #ifndef HAVE_SECURE_GETENV
-#ifdef HAVE___SECURE_GETENV
-#define secure_getenv __secure_getenv
-#elif defined(HAVE_GETUID) && defined(HAVE_GETEUID) \
+#if defined(HAVE_GETUID) && defined(HAVE_GETEUID) \
   && defined(HAVE_GETGID) && defined(HAVE_GETEGID)
 #define FALLBACK_SECURE_GETENV
 extern char *secure_getenv (const char *);
diff --git a/libgfortran/runtime/environ.c b/libgfortran/runtime/environ.c
index 07c6351a8d9..c44542afa02 100644
--- a/libgfortran/runtime/environ.c
+++ b/libgfortran/runtime/environ.c
@@ -37,9 +37,20 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    provided. */
 
 #ifdef FALLBACK_SECURE_GETENV
+
+#if SUPPORTS_WEAKREF && defined(HAVE___SECURE_GETENV)
+static char* weak_secure_getenv (const char*)
+  __attribute__((__weakref__("__secure_getenv")));
+#endif
+
 char *
 secure_getenv (const char *name)
 {
+#if SUPPORTS_WEAKREF && defined(HAVE___SECURE_GETENV)
+  if (weak_secure_getenv)
+    return weak_secure_getenv (name);
+#endif
+
   if ((getuid () == geteuid ()) && (getgid () == getegid ()))
     return getenv (name);
   else