diff --git a/system/twin/twin.SlackBuild b/system/twin/twin.SlackBuild
index 789e5f00ca..cc587a9db3 100644
--- a/system/twin/twin.SlackBuild
+++ b/system/twin/twin.SlackBuild
@@ -78,7 +78,7 @@ CXXFLAGS="$SLKCFLAGS" \
   --mandir=/usr/man \
   --build=$ARCH-slackware-linux
 
-make
+make -j1
 make install DESTDIR=$PKG
 
 find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \