diff --git a/startstop.build.sh b/startstop.build.sh
index 52f8518..e747e95 100755
--- a/startstop.build.sh
+++ b/startstop.build.sh
@@ -284,11 +284,11 @@ if [[ \$(type -t srv_\${srv}_\${cmd}) = 'function' ]]; then
         flock 99 || exit 1
 
         set -m
-        coproc {
+        {
             srv_\${srv}_\${cmd};
-        } > ${LOGDIR}/srv-\${srv}.log 2>&1
-        echo "\${COPROC_PID}" >> "\${PIDFILE}"
-        ps -o pgid= -p "\${COPROC_PID}" > "\${PGIDFILE}"
+        } > ${LOGDIR}/srv-\${srv}.log 2>&1 < /dev/null &
+        echo "\$!" >> "\${PIDFILE}"
+        ps -o pgid= -p "\$!" > "\${PGIDFILE}"
         exit
         ;;
       *)