diff --git a/SPECS/i3.spec b/SPECS/i3.spec
index 9c084a0..438d43f 100644
--- a/SPECS/i3.spec
+++ b/SPECS/i3.spec
@@ -83,6 +83,16 @@ find . -maxdepth 1 -type f -name "i3*" -exec sed -i -e '1s;^#!/usr/bin/env perl;
 
 
 %build
+%ifarch ppc64le
+%define buildarch powerpc64le
+%endif
+%ifarch ppc64
+%define buildarch powerpc64
+%endif
+%ifarch x86_64
+%define buildarch x86_64
+%endif
+
 ./configure \
   --build=%{_arch}-powerel-linux-gnu \
   --host=%{_arch}-powerel-linux-gnu \
@@ -101,13 +111,13 @@ find . -maxdepth 1 -type f -name "i3*" -exec sed -i -e '1s;^#!/usr/bin/env perl;
   --sharedstatedir=/var/lib \
   --mandir=/usr/share/man \
   --infodir=/usr/share/info
-%make_build -C %{_arch}-powerel-linux-gnu
+%make_build -C %{buildarch}-powerel-linux-gnu
 doxygen pseudo-doc.doxygen
 mv pseudo-doc/html pseudo-doc/doxygen
 
 
 %install
-%make_install -C %{_arch}-powerel-linux-gnu
+%make_install -C %{buildarch}-powerel-linux-gnu
 mkdir -p %{buildroot}%{_mandir}/man1/
 install -Dpm0644 man/*.1 %{buildroot}%{_mandir}/man1/
 mkdir -p %{buildroot}%{_datadir}/pixmaps/