diff --git a/csync2-librsync-1.0.0.patch b/csync2-librsync-1.0.0.patch
new file mode 100644
index 0000000..3d23037
--- /dev/null
+++ b/csync2-librsync-1.0.0.patch
@@ -0,0 +1,16 @@
+Index: csync2-2.0+git.1368794815.cf835a7/rsync.c
+===================================================================
+--- csync2-2.0+git.1368794815.cf835a7.orig/rsync.c
++++ csync2-2.0+git.1368794815.cf835a7/rsync.c
+@@ -461,7 +461,11 @@ int csync_rs_sigfile(const char *filenam
+ 		goto out;
+ 
+ 	csync_debug(3, "Running rs_sig_file() from librsync....\n");
++#ifdef RS_DEFAULT_STRONG_LEN
+ 	result = rs_sig_file(basis_file, sig_file, RS_DEFAULT_BLOCK_LEN, RS_DEFAULT_STRONG_LEN, &stats);
++#else
++	result = rs_sig_file(basis_file, sig_file, RS_DEFAULT_BLOCK_LEN, 8, RS_MD4_SIG_MAGIC, &stats);
++#endif
+ 	*sig_file_out = sig_file;
+ 	sig_file = NULL;
+ 	if (result != RS_DONE)
diff --git a/csync2.changes b/csync2.changes
index 3ea0d0b..400ddfc 100644
--- a/csync2.changes
+++ b/csync2.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Mar 26 11:25:01 UTC 2015 - dimstar@opensuse.org
+
+- Add csync2-librsync-1.0.0.patch: Fix build with librsync 1.0.0.
+
 -------------------------------------------------------------------
 Thu Sep 26 09:07:40 UTC 2013 - tserong@suse.com
 
diff --git a/csync2.spec b/csync2.spec
index 00e9381..886b268 100644
--- a/csync2.spec
+++ b/csync2.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package csync2
 #
-# Copyright (c) 2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -40,6 +40,8 @@ Patch11:        fix-csync2_ssl_cert-filename.patch
 Patch12:        fix-sonames.patch
 # PATCH-FIX-UPSTREAM -- add-COPYING.patch tserong@suse.com -- ensure COPYING is present in docfiles and thus %doc
 Patch13:        add-COPYING.patch
+# PATCH-FIX-UPSTREAM csync2-librsync-1.0.0.patch dimstar@opensuse.org -- Fix build with librsync 1.0.0
+Patch14:        csync2-librsync-1.0.0.patch
 
 BuildRequires:  autoconf
 BuildRequires:  automake
@@ -80,6 +82,7 @@ It is expedient for HA-clusters, HPC-clusters, COWs and server farms.
 %patch11 -p1
 %patch12 -p1
 %patch13 -p1
+%patch14 -p1
 
 %build
 export CFLAGS="%{optflags}"