diff --git a/.gitignore b/.gitignore
index 843c6b8..82eda28 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@
 /emacs-25.0.93.tar.xz
 /emacs-25.0.94.tar.xz
 /emacs-25.0.95.tar.xz
+/emacs-25.1-rc1.tar.xz
diff --git a/emacs-ppc64.patch b/emacs-ppc64.patch
deleted file mode 100644
index daed8c0..0000000
--- a/emacs-ppc64.patch
+++ /dev/null
@@ -1,62 +0,0 @@
-commit ff3fc21e24edffccce0d42065833e852a6792bd2
-Author: Paul Eggert <eggert@cs.ucla.edu>
-Date:   Tue Jul 19 15:23:14 2016 +0200
-
-    Port to glibc 2.24 (pre-release) + ppc64
-    
-    Backport from master (Bug#24033).
-    Inspired by a suggestion by Florian Weimer in:
-    https://sourceware.org/ml/libc-alpha/2016-07/msg00425.html
-    * src/emacs.c (main) [__PPC64__]:
-    Special case for __PPC64__, which needs ASLR disabled in
-    dumped Emacs too.
-
-diff --git a/src/emacs.c b/src/emacs.c
-index 5c187e7..2480dfc 100644
---- a/src/emacs.c
-+++ b/src/emacs.c
-@@ -674,6 +674,26 @@ main (int argc, char **argv)
- 
-   stack_base = &dummy;
- 
-+#if defined HAVE_PERSONALITY_LINUX32 && defined __PPC64__
-+  /* This code partly duplicates the HAVE_PERSONALITY_LINUX32 code
-+     below.  This duplication is planned to be fixed in a later
-+     Emacs release.  */
-+# define ADD_NO_RANDOMIZE 0x0040000
-+  int pers = personality (0xffffffff);
-+  if (! (pers & ADD_NO_RANDOMIZE)
-+      && 0 <= personality (pers | ADD_NO_RANDOMIZE))
-+    {
-+      /* Address randomization was enabled, but is now disabled.
-+	 Re-execute Emacs to get a clean slate.  */
-+      execvp (argv[0], argv);
-+
-+      /* If the exec fails, warn the user and then try without a
-+	 clean slate.  */
-+      perror (argv[0]);
-+    }
-+# undef ADD_NO_RANDOMIZE
-+#endif
-+
- #ifndef CANNOT_DUMP
-   might_dump = !initialized;
- #endif
-@@ -784,7 +804,7 @@ main (int argc, char **argv)
-   dumping = !initialized && (strcmp (argv[argc - 1], "dump") == 0
- 			     || strcmp (argv[argc - 1], "bootstrap") == 0);
- 
--#ifdef HAVE_PERSONALITY_LINUX32
-+#if defined HAVE_PERSONALITY_LINUX32 && !defined __PPC64__
-   if (dumping && ! getenv ("EMACS_HEAP_EXEC"))
-     {
-       /* Set this so we only do this once.  */
-@@ -801,7 +821,7 @@ main (int argc, char **argv)
-       /* If the exec fails, try to dump anyway.  */
-       emacs_perror (argv[0]);
-     }
--#endif /* HAVE_PERSONALITY_LINUX32 */
-+#endif
- 
- #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK) && !defined (CYGWIN)
-   /* Extend the stack space available.  Don't do that if dumping,
diff --git a/emacs.spec b/emacs.spec
index 342faac..5b9a143 100644
--- a/emacs.spec
+++ b/emacs.spec
@@ -4,12 +4,13 @@
 Summary:       GNU Emacs text editor
 Name:          emacs
 Epoch:         1
-Version:       25.0.95
-Release:       4%{?dist}
+Version:       25.1
+Release:       0.1.rc1%{?dist}
 License:       GPLv3+ and CC0-1.0
 URL:           http://www.gnu.org/software/emacs/
 Group:         Applications/Editors
-Source0:       ftp://ftp.gnu.org/gnu/emacs/emacs-%{version}.tar.xz
+#Source0:       ftp://ftp.gnu.org/gnu/emacs/emacs-%{version}.tar.xz
+Source0:       ftp://alpha.gnu.org/gnu/emacs/pretest/emacs-%{version}-rc1.tar.xz
 Source1:       emacs.desktop
 Source3:       dotemacs.el
 Source4:       site-start.el
@@ -25,7 +26,6 @@ Patch1:        emacs-spellchecker.patch
 # Fix for default PDF viewer bug #971162
 Patch2:        emacs-pdf-default.patch
 Patch3:        emacs-system-crypto-policies.patch
-Patch4:        emacs-ppc64.patch
 
 BuildRequires: atk-devel
 BuildRequires: cairo-devel
@@ -168,7 +168,6 @@ packages that add functionality to Emacs.
 %patch1 -p1 -b .spellchecker
 %patch2 -p1 -b .pdf-default.patch
 %patch3 -p1 -b .system-crypto-policies
-%patch4 -p1 -b .ppc64
 autoconf
 
 # We prefer our emacs.desktop file
@@ -448,6 +447,9 @@ update-desktop-database &> /dev/null || :
 %dir %{_datadir}/emacs/site-lisp/site-start.d
 
 %changelog
+* Mon Jul 25 2016 Jan Synáček <jsynacek@redhat.com> - 1:25.1-0.1.rc1
+- update to 25.1 rc1
+
 * Fri Jul 22 2016 Jan Synáček <jsynacek@redhat.com> - 1:25.0.95-4
 - fix: emacs build failure due to high memory consumption on ppc64 (#1356919)
 
diff --git a/sources b/sources
index ecc72bf..5686666 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-c2530c89b48a30ccb6c82f2093e7a889  emacs-25.0.95.tar.xz
+a99157273140cba953fbd6bec232360f  emacs-25.1-rc1.tar.xz