diff --git a/laravel/database/schema/grammars/postgres.php b/laravel/database/schema/grammars/postgres.php
index 30bfa2f6..8eb6b4dd 100644
--- a/laravel/database/schema/grammars/postgres.php
+++ b/laravel/database/schema/grammars/postgres.php
@@ -146,7 +146,11 @@ public function primary(Table $table, Fluent $command)
 	 */
 	public function unique(Table $table, Fluent $command)
 	{
-		return $this->key($table, $command, true);
+		$table = $this->wrap($table);
+
+		$columns = $this->columnize($command->columns);
+
+		return "ALTER TABLE $table ADD CONSTRAINT ".$command->name." UNIQUE ($columns)";
 	}
 
 	/**
@@ -283,7 +287,7 @@ public function drop_primary(Table $table, Fluent $command)
 	 */
 	public function drop_unique(Table $table, Fluent $command)
 	{
-		return $this->drop_key($table, $command);
+		return "ALTER TABLE ".$this->wrap($table)." DROP CONSTRAINT ".$command->name;
 	}
 
 	/**