--- a/src/oldloader.cpp
+++ b/src/oldloader.cpp
@@ -1620,16 +1620,6 @@
 				 * clear it for ourselves and let OTTD's rebuild PBS itself */
 				_m[i].m4 &= 0xF; /* Only keep the lower four bits; upper four is PBS */
 				break;
-			case MP_WATER: {
-				/* TTDPatch has all tiles touching water as coast (water)-type, we don't.
-				 * This is only true from a certain TTDP version, but there is no harm
-				 * in checking all the time */
-				Slope s = GetTileSlope(i, NULL);
-				if (s == SLOPE_ENW || s == SLOPE_NWS || s == SLOPE_SEN || s == SLOPE_WSE || IsSteepSlope(s)) {
-					SetTileType(i, MP_CLEAR);
-					SetTileOwner(i, OWNER_NONE);
-				}
-			} break;
 			default: break;
 		}
 	}