diff --git a/oam/install_scripts/mcs-primproc.service.in b/oam/install_scripts/mcs-primproc.service.in
index baee874d4..bb5b843c8 100644
--- a/oam/install_scripts/mcs-primproc.service.in
+++ b/oam/install_scripts/mcs-primproc.service.in
@@ -7,7 +7,7 @@ After=mcs-controllernode.service
 [Service]
 Type=simple
 ExecStart=/usr/bin/env bash -c "LD_PRELOAD=$(ldconfig -p | grep -m1 libjemalloc | awk '{print $1}') exec @ENGINE_BINDIR@/PrimProc"
-ExecStartPost=sleep 2
+ExecStartPost=/bin/sleep 2
 Restart=on-failure
 TimeoutStopSec=2