diff --git a/src/tgp.cpp b/src/tgp.cpp
--- a/src/tgp.cpp
+++ b/src/tgp.cpp
@@ -538,7 +538,7 @@ static void HeightMapAdjustWaterLevel(am
 	 * Transform the height map into new (normalized) height map:
 	 *   values from range: h_min..h_water_level will become negative so it will be clamped to 0
 	 *   values from range: h_water_level..h_max are transformed into 0..h_max_new
-	 * , where h_max_new is 4, 8, 12 or 16 depending on terrain type (very flat, flat, hilly, mountains)
+	 *   where h_max_new is 4, 8, 12 or 16 depending on terrain type (very flat, flat, hilly, mountains)
 	 */
 	FOR_ALL_TILES_IN_HEIGHT(h) {
 		/* Transform height from range h_water_level..h_max into 0..h_max_new range */