diff --git a/neuron.spec b/neuron.spec
index 4e3ac25..9d0dd7e 100644
--- a/neuron.spec
+++ b/neuron.spec
@@ -22,7 +22,7 @@ Please install the %{name}-devel package to compile nmodl files and so on.
 
 Name:       neuron
 Version:    7.8.1
-Release:    3%{?dist}
+Release:    4%{?dist}
 Summary:    A flexible and powerful simulator of neurons and networks
 
 License:    GPLv3+
@@ -85,7 +85,10 @@ Summary:    Development files for %{name}
 Requires: %{name}%{?_isa} = %{version}-%{release}
 Requires:  ncurses-devel
 Requires:  readline-devel
+Requires:  gcc-c++
 Requires:  libtool
+Requires:  libX11-devel
+Requires:  libXext-devel
 
 %description devel
 Headers and development shared libraries for the %{name} package
@@ -267,6 +270,9 @@ rm -rf $RPM_BUILD_ROOT/%{_includedir}/ivstream.h
 %{_datadir}/%{tarname}/demo
 
 %changelog
+* Thu Oct 08 2020 Ankur Sinha <ankursinha AT fedoraproject DOT org> - 7.8.1-4
+- Add missing g++ and X dependencies
+
 * Thu Oct 08 2020 Ankur Sinha <ankursinha AT fedoraproject DOT org> - 7.8.1-3
 - Remove iv header
 - disable dynamic build, not needed for Fedora: we support the default python version