diff --git a/system/firetools/firetools.SlackBuild b/system/firetools/firetools.SlackBuild
index ec5a3dce9c..3c066cd7f0 100644
--- a/system/firetools/firetools.SlackBuild
+++ b/system/firetools/firetools.SlackBuild
@@ -81,6 +81,7 @@ CXXFLAGS="$SLKCFLAGS" \
   --build=$ARCH-slackware-linux
 
 sed -i "s|share/man|man|g" Makefile
+sed -i "s|lib/|lib${LIBDIRSUFFIX}/|g" Makefile
 make
 make install DESTDIR=$PKG