diff --git a/debian/rules b/debian/rules
index e6644d8ef..e8c46d189 100755
--- a/debian/rules
+++ b/debian/rules
@@ -7,7 +7,7 @@ CXXFLAGS=-O3 -fstack-protector-strong
 	dh $@ --with systemd
 
 override_dh_auto_build:
-	make -j 4
+	make -j
 
 override_dh_systemd_start:
 	dh_systemd_start --restart-after-upgrade