diff --git a/pacemaker.spec b/pacemaker.spec
index ec325b6..3d7697f 100644
--- a/pacemaker.spec
+++ b/pacemaker.spec
@@ -18,7 +18,7 @@
 
 ## Upstream commit (or git tag, such as "Pacemaker-" plus the
 ## {pcmkversion} macro for an official release) to use for this package
-%global commit Pacemaker-1.1.17-rc3
+%global commit Pacemaker-1.1.17-rc4
 ## Since git v2.11, the extent of abbreviation is autoscaled by default
 ## (used to be constant of 7), so we need to convey it for non-tags, too.
 %global commit_abbrev 9
@@ -159,7 +159,9 @@ BuildRequires: coreutils findutils grep sed
 
 # Required for core functionality
 BuildRequires: automake autoconf libtool pkgconfig libtool-ltdl-devel
-BuildRequires: pkgconfig(glib-2.0) libxml2-devel libxslt-devel libuuid-devel
+## version lower bound for: G_GNUC_INTERNAL
+BuildRequires: pkgconfig(glib-2.0) >= 2.6
+BuildRequires: libxml2-devel libxslt-devel libuuid-devel
 BuildRequires: bzip2-devel pam-devel
 
 # Required for agent_config.h which specifies the correct scratch directory
@@ -684,6 +686,12 @@ exit 0
 %license %{nagios_name}-%{nagios_hash}/COPYING
 
 %changelog
+* Thu Jun 22 2017 Jan Pokorný <jpokorny+rpm-pacemaker@redhat.com> - 1.1.17-0.1.rc4
+- Update for new upstream tarball for release candidate: Pacemaker-1.1.17-rc4,
+  for full details, see included ChangeLog file or
+  https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-1.1.17-rc4
+- Add an imposed lower bound for glib2 BuildRequire
+
 * Thu Jun 01 2017 Jan Pokorný <jpokorny+rpm-pacemaker@redhat.com> - 1.1.17-0.1.rc3
 - Update for new upstream tarball for release candidate: Pacemaker-1.1.17-rc3,
   for full details, see included ChangeLog file or
diff --git a/sources b/sources
index 6552797..37aa016 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (pacemaker-1.1.17-rc3.tar.gz) = d501cfe8f7bb725da8691ec1f4dbca78c54d796bd724cbb39a8808f698fe9fee73b4a29e97799d36e149dab104f81b82c9b6f59f38def1aec426ba4b4bd284a3
+SHA512 (pacemaker-1.1.17-rc4.tar.gz) = 0dda60189e1dc7f2f0b3fa87f2ab6e0a70fa1e90ed8229c9881a650cddef41c6506974309ac00e64ea609254099c625fafa844b4bad2a408460eaca0b6a65746
 SHA512 (nagios-agents-metadata-105ab8a7b2c16b9a29cf1c1596b80136eeef332b.tar.gz) = 11ddeb48a4929e7642b6dfa9c7962aa1d7a1af1c569830f55ed6cd6773abac13377317327bc1db8411c8077884f83f81cc54d746c834b63a99fa6dc219b5caad