diff --git a/src/main/java/com/backend/glowhouse/repository/DeviceRepositoryCustom.java b/src/main/java/com/backend/glowhouse/repository/DeviceRepositoryCustom.java
deleted file mode 100644
index fab57b4b237a83057d7271127eda5ff008ccd8ea..0000000000000000000000000000000000000000
--- a/src/main/java/com/backend/glowhouse/repository/DeviceRepositoryCustom.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.backend.glowhouse.repository;
-
-import com.backend.glowhouse.model.Device;
-
-public interface DeviceRepositoryCustom {
-    Device registerDevice(String deviceId, String username);
-}
diff --git a/src/main/java/com/backend/glowhouse/repository/device/DeviceRepositoryCustom.java b/src/main/java/com/backend/glowhouse/repository/device/DeviceRepositoryCustom.java
new file mode 100644
index 0000000000000000000000000000000000000000..77ecc5cf152168394ccf62b7c98901ebeda56b16
--- /dev/null
+++ b/src/main/java/com/backend/glowhouse/repository/device/DeviceRepositoryCustom.java
@@ -0,0 +1,7 @@
+package com.backend.glowhouse.repository.device;
+
+import com.backend.glowhouse.model.Device;
+
+public interface DeviceRepositoryCustom {
+    Device updateDeviceAssignUserAndSetRegisteredTrue(String deviceId, String username);
+}