diff --git a/internal/db/db.go b/internal/db/db.go
index b36df79..445a94e 100644
--- a/internal/db/db.go
+++ b/internal/db/db.go
@@ -87,10 +87,18 @@ func OrderByCreatedAtAsc(db *gorm.DB) *gorm.DB {
 	return db.Order("created_at asc")
 }
 
+func OrderByUsersCreatedAtAsc(db *gorm.DB) *gorm.DB {
+	return db.Order("users.created_at asc")
+}
+
 func OrderByCreatedAtDesc(db *gorm.DB) *gorm.DB {
 	return db.Order("created_at desc")
 }
 
+func OrderByUsersCreatedAtDesc(db *gorm.DB) *gorm.DB {
+	return db.Order("users.created_at desc")
+}
+
 func OrderByIDAsc(db *gorm.DB) *gorm.DB {
 	return db.Order("id asc")
 }
diff --git a/server/handlers/admin.go b/server/handlers/admin.go
index 5b5bc5c..d072ded 100644
--- a/server/handlers/admin.go
+++ b/server/handlers/admin.go
@@ -243,9 +243,9 @@ func AdminGetRoomMembers(ctx *gin.Context) {
 	switch ctx.DefaultQuery("sort", "name") {
 	case "join":
 		if desc {
-			scopes = append(scopes, db.OrderByCreatedAtDesc)
+			scopes = append(scopes, db.OrderByUsersCreatedAtDesc)
 		} else {
-			scopes = append(scopes, db.OrderByCreatedAtAsc)
+			scopes = append(scopes, db.OrderByUsersCreatedAtAsc)
 		}
 	case "name":
 		if desc {
diff --git a/server/handlers/member.go b/server/handlers/member.go
index 93a2d1b..c055422 100644
--- a/server/handlers/member.go
+++ b/server/handlers/member.go
@@ -40,9 +40,9 @@ func RoomMembers(ctx *gin.Context) {
 	switch ctx.DefaultQuery("sort", "name") {
 	case "join":
 		if desc {
-			scopes = append(scopes, db.OrderByCreatedAtDesc)
+			scopes = append(scopes, db.OrderByUsersCreatedAtDesc)
 		} else {
-			scopes = append(scopes, db.OrderByCreatedAtAsc)
+			scopes = append(scopes, db.OrderByUsersCreatedAtAsc)
 		}
 	case "name":
 		if desc {
@@ -139,9 +139,9 @@ func RoomAdminMembers(ctx *gin.Context) {
 	switch ctx.DefaultQuery("sort", "name") {
 	case "join":
 		if desc {
-			scopes = append(scopes, db.OrderByCreatedAtDesc)
+			scopes = append(scopes, db.OrderByUsersCreatedAtDesc)
 		} else {
-			scopes = append(scopes, db.OrderByCreatedAtAsc)
+			scopes = append(scopes, db.OrderByUsersCreatedAtAsc)
 		}
 	case "name":
 		if desc {