diff --git a/academic/exonerate/exonerate.SlackBuild b/academic/exonerate/exonerate.SlackBuild
index 6fef2cf6de..6fa5c33073 100644
--- a/academic/exonerate/exonerate.SlackBuild
+++ b/academic/exonerate/exonerate.SlackBuild
@@ -2,7 +2,7 @@
 
 # Slackware build script for exonerate
 
-# Copyright 2017 Petar petrov slackalaxy@gmail.com
+# Copyright 2017-2021 Petar Petrov slackalaxy@gmail.com
 # All rights reserved.
 #
 # Redistribution and use of this script, with or without modification, is
@@ -80,7 +80,7 @@ CXXFLAGS="$SLKCFLAGS" \
   --docdir=/usr/doc/$PRGNAM-$VERSION \
   --build=$ARCH-slackware-linux
 
-make
+make -j1
 make install DESTDIR=$PKG
 
 find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \