diff --git a/interfaces/builtin/custom_device.go b/interfaces/builtin/custom_device.go
index e39abedc197..98e81665462 100644
--- a/interfaces/builtin/custom_device.go
+++ b/interfaces/builtin/custom_device.go
@@ -52,7 +52,7 @@ var (
 	customDeviceInternalError = errors.New(`custom-device interface internal error`)
 
 	// Validating regexp for filesystem paths
-	customDevicePathRegexp = regexp.MustCompile(`^/[^"@]*$`)
+	customDevicePathRegexp = regexp.MustCompile(`^/[^"]*$`)
 
 	// Validating regexp for udev device names.
 	// We forbid:
diff --git a/interfaces/builtin/custom_device_test.go b/interfaces/builtin/custom_device_test.go
index 19de629758d..83f4928f335 100644
--- a/interfaces/builtin/custom_device_test.go
+++ b/interfaces/builtin/custom_device_test.go
@@ -72,9 +72,11 @@ slots:
   read-devices:
     - /dev/js*
   files:
-    write: [ /bar ]
+    write: [ /bar, /baz@qux ]
     read:
       - /dev/input/by-id/*
+      - /dev/dma_heap/qcom,qseecom
+      - /sys/devices/platform/soc@0/soc@0:bus@30000000/30350000.ocotp-ctrl/imx-ocotp0/nvmem
   udev-tagging:
     - kernel: input/mice
       subsystem: input
@@ -208,10 +210,6 @@ apps:
 			"devices: [/dev/foo**]",
 			`custom-device "devices" path contains invalid glob pattern "\*\*"`,
 		},
-		{
-			"devices: [/dev/@foo]",
-			`custom-device "devices" path must start with / and cannot contain special characters.*`,
-		},
 		{
 			"devices: [/dev/foo|bar]",
 			`custom-device "devices" path must start with /dev/ and cannot contain special characters.*`,