diff --git a/overlay/etc/udev/rules.d/81-et-ic7200.rules b/overlay/etc/udev/rules.d/81-et-ic7200.rules
index ed620cd..a067a71 100644
--- a/overlay/etc/udev/rules.d/81-et-ic7200.rules
+++ b/overlay/etc/udev/rules.d/81-et-ic7200.rules
@@ -13,8 +13,10 @@ KERNEL=="ttyUSB[0-9]*", SUBSYSTEM=="tty", ATTRS{serial}=="IC-7200*", \
     ENV{ET_DEVICE}="IC-7200"
 
 # Create consistent device name/path for the CAT serial device
+# Prevent the gpsd system unit from incorrectly flagging this as a GPS device
 ENV{ET_DEVICE}=="IC-7200", SUBSYSTEMS=="usb", ATTRS{idVendor}=="10c4" ATTRS{idProduct}=="ea60", \
     ACTION=="add", \
+    ENV{SYSTEMD_WANTS}="", \
     ENV{ET_SUBDEVICE}="CAT", GROUP="dialout", MODE="0660", SYMLINK+="et-cat"
 
 # TODO: Add rules for sound card