diff --git a/roomserver/storage/postgres/membership_table.go b/roomserver/storage/postgres/membership_table.go
index bd83ae214..b4a27900c 100644
--- a/roomserver/storage/postgres/membership_table.go
+++ b/roomserver/storage/postgres/membership_table.go
@@ -141,7 +141,7 @@ const selectLocalServerInRoomSQL = "" +
 const selectServerInRoomSQL = "" +
 	"SELECT room_nid FROM roomserver_membership" +
 	" JOIN roomserver_event_state_keys ON roomserver_membership.target_nid = roomserver_event_state_keys.event_state_key_nid" +
-	" WHERE membership_nid = $1 AND room_nid = $2 AND event_state_key LIKE '%:$3' LIMIT 1"
+	" WHERE membership_nid = $1 AND room_nid = $2 AND event_state_key LIKE '%:' || $3 LIMIT 1"
 
 type membershipStatements struct {
 	insertMembershipStmt                            *sql.Stmt
diff --git a/roomserver/storage/sqlite3/membership_table.go b/roomserver/storage/sqlite3/membership_table.go
index 8f7fd2e70..911a25168 100644
--- a/roomserver/storage/sqlite3/membership_table.go
+++ b/roomserver/storage/sqlite3/membership_table.go
@@ -117,7 +117,7 @@ const selectLocalServerInRoomSQL = "" +
 const selectServerInRoomSQL = "" +
 	"SELECT room_nid FROM roomserver_membership" +
 	" JOIN roomserver_event_state_keys ON roomserver_membership.target_nid = roomserver_event_state_keys.event_state_key_nid" +
-	" WHERE membership_nid = $1 AND room_nid = $2 AND event_state_key LIKE '%:$3' LIMIT 1"
+	" WHERE membership_nid = $1 AND room_nid = $2 AND event_state_key LIKE '%:' || $3 LIMIT 1"
 
 type membershipStatements struct {
 	db                                              *sql.DB