diff --git a/lcgdm.spec b/lcgdm.spec
index 5ea9e25..342701e 100644
--- a/lcgdm.spec
+++ b/lcgdm.spec
@@ -59,15 +59,8 @@ Patch0:		%{name}-python-exception.patch
 # https://its.cern.ch/jira/browse/LCGDM-1576
 #Patch1:		%%{name}-dpm-listspaces-dav.patch
 
-%if %{?rhel}%{!?rhel:0} == 5
 BuildRequires:  gcc-c++
-BuildRequires:	buildsys-macros
-%endif
-%if %{?fedora}%{!?fedora:0} >= 5 || %{?rhel}%{!?rhel:0} >= 5
 BuildRequires:	imake
-%else
-BuildRequires:	xorg-x11-devel
-%endif
 BuildRequires:	globus-gssapi-gsi-devel
 BuildRequires:	globus-gss-assist-devel
 BuildRequires:	globus-gsi-credential-devel
@@ -79,19 +72,15 @@ BuildRequires:	voms-devel
 BuildRequires:	gsoap-devel
 BuildRequires:	CGSI-gSOAP-devel >= 1.3.4.0
 
-%if %{?fedora}%{!?fedora:0} >= 28
+%if 0%{?fedora} >= 28
 BuildRequires:	mariadb-connector-c-devel
 BuildRequires:  libnsl2-devel
 %else
 BuildRequires:  mysql-devel
 %endif
-%if %{?fedora}%{!?fedora:0} >= 12 || %{?rhel}%{!?rhel:0} >= 6
 BuildRequires:	libuuid-devel
-%else
-BuildRequires:	e2fsprogs-devel
-%endif
 BuildRequires:	swig
-%if %{?fedora}%{!?fedora:0} >= 7 || %{?rhel}%{!?rhel:0} >= 6
+%if 0%{?rhel} && 0%{?rhel} <= 7
 BuildRequires:	perl-devel
 %else
 BuildRequires:	perl