diff --git a/profiles/pentoo/base/make.defaults b/profiles/pentoo/base/make.defaults
index facce7de2..8d593de28 100644
--- a/profiles/pentoo/base/make.defaults
+++ b/profiles/pentoo/base/make.defaults
@@ -32,6 +32,7 @@ INPUT_DEVICES="evdev"
 PORTAGE_ELOG_CLASSES="${PORTAGE_ELOG_CLASSES} qa"
 
 PORTAGE_NICENESS="9"
+PORTAGE_IO_NICENESS="ionice -c 3 -p \${PID}"
 
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