diff --git a/service/camera-streamer-arducam-16MP.service b/service/camera-streamer-arducam-16MP.service
index 0b7b361..eb6dcc3 100644
--- a/service/camera-streamer-arducam-16MP.service
+++ b/service/camera-streamer-arducam-16MP.service
@@ -3,6 +3,7 @@ Description=camera-streamer web camera
 After=network.target
 
 [Service]
+ConditionPathExists=/sys/bus/i2c/drivers/imx519/10-001a/video4linux
 ExecStart=/usr/local/bin/camera-streamer \
   -camera-path=/base/soc/i2c0mux/i2c@1/imx519@1a \
   -camera-type=libcamera \
diff --git a/service/camera-streamer-arducam-64MP.service b/service/camera-streamer-arducam-64MP.service
index 05e5d94..dc24eae 100644
--- a/service/camera-streamer-arducam-64MP.service
+++ b/service/camera-streamer-arducam-64MP.service
@@ -3,6 +3,7 @@ Description=camera-streamer web camera
 After=network.target
 
 [Service]
+ConditionPathExists=/sys/bus/i2c/drivers/arducam_64mp/10-001a/video4linux
 ; set fixed-focus
 ExecStartPre=-/usr/bin/v4l2-ctl -d /dev/v4l-subdev1 -c focus_absolute=2200
 
diff --git a/service/camera-streamer-usb-cam.service b/service/camera-streamer-usb-cam.service
index 9314e97..ec6e33b 100644
--- a/service/camera-streamer-usb-cam.service
+++ b/service/camera-streamer-usb-cam.service
@@ -3,6 +3,7 @@ Description=camera-streamer web camera
 After=network.target
 
 [Service]
+ConditionPathExistsGlob=/dev/v4l/by-id/usb-*-video-index0
 ExecStart=/usr/local/bin/camera-streamer \
   -camera-path=/dev/video0 \
   -camera-format=JPEG \