diff --git a/models/repo/following_repo.go b/models/repo/following_repo.go
index f3b3a57406..b5c932ef52 100644
--- a/models/repo/following_repo.go
+++ b/models/repo/following_repo.go
@@ -12,7 +12,7 @@ import (
 type FollowingRepo struct {
 	ID               int64  `xorm:"pk autoincr"`
 	RepoID           int64  `xorm:"NOT NULL"`
-	ExternalID       string `xorm:"TEXT UNIQUE(federation_repo_mapping) NOT NULL"`
+	ExternalID       string `xorm:"UNIQUE(federation_repo_mapping) NOT NULL"`
 	FederationHostID int64  `xorm:"UNIQUE(federation_repo_mapping) NOT NULL"`
 	URI              string
 }
diff --git a/models/user/federated_user.go b/models/user/federated_user.go
index 7c8fe7c8ad..1fc42c3c32 100644
--- a/models/user/federated_user.go
+++ b/models/user/federated_user.go
@@ -10,7 +10,7 @@ import (
 type FederatedUser struct {
 	ID               int64  `xorm:"pk autoincr"`
 	UserID           int64  `xorm:"NOT NULL"`
-	ExternalID       string `xorm:"TEXT UNIQUE(federation_user_mapping) NOT NULL"`
+	ExternalID       string `xorm:"UNIQUE(federation_user_mapping) NOT NULL"`
 	FederationHostID int64  `xorm:"UNIQUE(federation_user_mapping) NOT NULL"`
 }