diff --git a/freewrl.spec b/freewrl.spec
index dfef4ad..da7bf1d 100644
--- a/freewrl.spec
+++ b/freewrl.spec
@@ -33,7 +33,7 @@ BuildRequires:	libjpeg-devel, libpng-devel, java-devel, unzip, wget
 BuildRequires:	ImageMagick, desktop-file-utils, chrpath
 BuildRequires:	libXaw-devel, libXmu-devel, freealut-devel
 BuildRequires:	liblo-devel, libcurl-devel, openal-soft-devel
-%ifnarch armv7hl
+%ifnarch armv7hl s390x
 BuildRequires:	firefox
 %endif
 BuildRequires:	sox, doxygen, /usr/bin/latex, /usr/bin/mf
@@ -88,7 +88,7 @@ Requires:	libEAI%{?_isa} = %{version}-%{release}
 %description -n libEAI-devel
 Development libraries and headers for libEAI.
 
-%ifnarch armv7hl
+%ifnarch armv7hl s390x
 %package plugin
 Summary:	Browser plugin for FreeWRL
 Requires:	freewrl%{?_isa} = %{version}-%{release}
@@ -132,8 +132,8 @@ make install DESTDIR=%{buildroot}
 mkdir -p %{buildroot}%{_datadir}/%{name}/
 install -p src/java/java.policy %{buildroot}%{_datadir}/%{name}/
 
-# no firefox on armv7hl
-%ifarch armv7hl
+# no firefox on armv7hl | s390x
+%ifarch armv7hl s390x
 rm -rf %{buildroot}%{_libdir}/mozilla/plugins/libFreeWRLplugin.so
 %endif
 
@@ -185,7 +185,7 @@ chrpath --delete %{buildroot}%{_libdir}/libFreeWRLEAI.so.*
 
 # Plugin is dead and gone, thanks to Mozilla.
 %if 0
-%ifnarch armv7hl
+%ifnarch armv7hl s390x
 %files plugin
 %{_libdir}/mozilla/plugins/libFreeWRLplugin.so
 %endif