diff --git a/Builds/Linux/build/40-open-ephys.rules b/Builds/Linux/build/40-open-ephys.rules
index 3c552579da25cd4507897d86403ce74d67c68aeb..9dd2a6f2b4fc97f9870971d992d96ce13c20c1af 100644
--- a/Builds/Linux/build/40-open-ephys.rules
+++ b/Builds/Linux/build/40-open-ephys.rules
@@ -14,7 +14,7 @@ SUBSYSTEM=="usb_device", SYSFS{idVendor}=="0403", SYSFS{idProduct}=="6010", MODE
 # For FedoraCore 7 and similar:
 
 # Change permissions for Opal Kelly FPGAs
-SUBSYSTEM=="usb", ATTRS{idVendor}=="151f", MODE="0666"
+SUBSYSTEM=="usb", ATTRS{idVendor}=="151f", MODE:="0666"
 
 # Change permissions for the Intan Development Board:
 SUBSYSTEM=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6010", MODE:="0666"