diff --git a/bin/kafka-server-stop.sh b/bin/kafka-server-stop.sh
index 4c86fddf43e..437189f4a5b 100755
--- a/bin/kafka-server-stop.sh
+++ b/bin/kafka-server-stop.sh
@@ -22,7 +22,7 @@ if [[ "$OSNAME" == "OS/390" ]]; then
     fi
     PIDS=$(ps -A -o pid,jobname,comm | grep -i $JOBNAME | grep java | grep -v grep | awk '{print $1}')
 elif [[ "$OSNAME" == "OS400" ]]; then
-    PIDS=$(ps -af | grep -i 'kafka\.Kafka' | grep java | grep -v grep | awk '{print $2}')
+    PIDS=$(ps -Af | grep -i 'kafka\.Kafka' | grep java | grep -v grep | awk '{print $2}')
 else
     PIDS=$(ps ax | grep ' kafka\.Kafka ' | grep java | grep -v grep | awk '{print $1}')
 fi
diff --git a/bin/zookeeper-server-stop.sh b/bin/zookeeper-server-stop.sh
index 725c02d00d9..11665f32707 100755
--- a/bin/zookeeper-server-stop.sh
+++ b/bin/zookeeper-server-stop.sh
@@ -22,7 +22,7 @@ if [[ "$OSNAME" == "OS/390" ]]; then
     fi
     PIDS=$(ps -A -o pid,jobname,comm | grep -i $JOBNAME | grep java | grep -v grep | awk '{print $1}')
 elif [[ "$OSNAME" == "OS400" ]]; then
-    PIDS=$(ps -af | grep java | grep -i QuorumPeerMain | grep -v grep | awk '{print $2}')
+    PIDS=$(ps -Af | grep java | grep -i QuorumPeerMain | grep -v grep | awk '{print $2}')
 else
     PIDS=$(ps ax | grep java | grep -i QuorumPeerMain | grep -v grep | awk '{print $1}')
 fi