--- a/src/water_cmd.cpp	Sat Jan 19 17:00:54 2008 +0000
+++ b/src/water_cmd.cpp	Sat Jan 19 18:24:20 2008 +0000
@@ -271,7 +271,7 @@
 	if (p1 >= MapSize()) return CMD_ERROR;
 
 	/* Outside of the editor you can only build canals, not oceans */
-	if (p2 == 0 && _game_mode != GM_EDITOR) return CMD_ERROR;
+	if (p2 != 0 && _game_mode != GM_EDITOR) return CMD_ERROR;
 
 	x = TileX(tile);
 	y = TileY(tile);