diff --git a/releng.control/ant_low_priority.sh b/releng.control/ant_low_priority.sh
index fc97c7c35935d00df2b7c34ae2d4795c0426b08e..8d778088fd4172ae8bb0361c978bc03002fc6e09 100644
--- a/releng.control/ant_low_priority.sh
+++ b/releng.control/ant_low_priority.sh
@@ -20,5 +20,5 @@ then
 fi
 
 
-echo "Running ant at priority 10"
-exec nice --adjustment 10 "${RELENG_CONTROL}/ant.sh" "$@"
+echo "Running ant at priority +15"
+exec nice --adjustment 15 "${RELENG_CONTROL}/ant.sh" "$@"