diff --git a/sessreg.changes b/sessreg.changes
index b616877..f20159f 100644
--- a/sessreg.changes
+++ b/sessreg.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Mon Feb 23 10:52:56 UTC 2015 - sndirsch@suse.com
+
+- u_Pass-P-to-the-preprocessor-when-generating-filenames.patch
+  * Pass -P to the preprocessor when generating filenames for the
+    manpage.  Fixes build with GCC 5. Patch by Richard Biener
+    <rguenther@suse.com>
+
 -------------------------------------------------------------------
 Fri Jan 30 15:18:48 UTC 2015 - zaitor@opensuse.org
 
diff --git a/sessreg.spec b/sessreg.spec
index fbc6db8..86f5c0a 100644
--- a/sessreg.spec
+++ b/sessreg.spec
@@ -24,6 +24,9 @@ License:        MIT
 Group:          System/X11/Utilities
 Url:            http://xorg.freedesktop.org/
 Source0:        http://xorg.freedesktop.org/releases/individual/app/%{name}-%{version}.tar.bz2
+Patch0:         u_Pass-P-to-the-preprocessor-when-generating-filenames.patch
+BuildRequires:  autoconf
+BuildRequires:  automake
 BuildRequires:  pkg-config
 BuildRequires:  pkgconfig(xorg-macros) >= 1.4
 BuildRequires:  pkgconfig(xproto) >= 7.0.25
@@ -38,8 +41,10 @@ other display managers such as gdm or kdm.
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
+autoreconf -fi
 %configure
 make %{?_smp_mflags}
 
diff --git a/u_Pass-P-to-the-preprocessor-when-generating-filenames.patch b/u_Pass-P-to-the-preprocessor-when-generating-filenames.patch
new file mode 100644
index 0000000..8553dc2
--- /dev/null
+++ b/u_Pass-P-to-the-preprocessor-when-generating-filenames.patch
@@ -0,0 +1,27 @@
+From 86e163c72b65e634369dfc50e3951af3bd234d4d Mon Sep 17 00:00:00 2001
+From: Stefan Dirsch <sndirsch@suse.de>
+Date: Mon, 23 Feb 2015 11:50:12 +0100
+Subject: [PATCH] Pass -P to the preprocessor when generating filenames for the
+ manpage.
+
+Fixes build with GCC 5. Patch by Richard Biener <rguenther@suse.com>
+---
+ man/Makefile.am | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/man/Makefile.am b/man/Makefile.am
+index 665ace5..2e5f146 100644
+--- a/man/Makefile.am
++++ b/man/Makefile.am
+@@ -9,7 +9,7 @@ SUFFIXES = .$(APP_MAN_SUFFIX) .man
+ 
+ AM_CPPFLAGS = -I$(top_builddir) -I$(top_srcdir)
+ filenames.sed: filenames.sed.c
+-	$(AM_V_GEN)$(CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
++	$(AM_V_GEN)$(CPP) -P $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+ 	    $(AM_CPPFLAGS) $(CPPFLAGS) $(srcdir)/filenames.sed.c | \
+ 	    $(SED) -n -e '/s|__/ p' -e '/^\/__/ p' > $@
+ 
+-- 
+1.8.4.5
+