diff --git a/qgis.spec b/qgis.spec
index 1ffc14d..d3d4610 100644
--- a/qgis.spec
+++ b/qgis.spec
@@ -1,5 +1,13 @@
 #TODO: Fix error message with processing plug-in in regards to pyspatialite
 
+# Limit the number of concurrent make to avoid failures due races:
+# qgsprojectionselector.h:14:10: fatal error: ui_qgsprojectionselectorbase.h: No such file or directory
+# #include <ui_qgsprojectionselectorbase.h>
+#          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+%if %(grep -c processor /proc/cpuinfo) > 4
+%_smp_mflags -j4
+%endif
+
 # Shared lib calls exit
 # https://hub.qgis.org/issues/2854
 
@@ -19,7 +27,7 @@
 
 Name:           qgis
 Version:        2.18.10
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        A user friendly Open Source Geographic Information System
 Group:          Applications/Engineering
 
@@ -417,6 +425,9 @@ update-mime-database %{?fedora:-n} %{_datadir}/mime &> /dev/null || :
 
 
 %changelog
+* Mon Jun 26 2017 Daniele Viganò <daniele@vigano.me> - 2.18.10-2
+- Limit maximum number of concurrent make
+
 * Mon Jun 26 2017 Daniele Viganò <daniele@vigano.me> - 2.18.10-1
 - Fix an issue in the QGIS server httpd configuration
 - New upstream release