diff --git a/tilemap/include/tilemap/generation.h b/tilemap/include/tilemap/generation.h
index 0df1be7..1119a9d 100644
--- a/tilemap/include/tilemap/generation.h
+++ b/tilemap/include/tilemap/generation.h
@@ -70,7 +70,7 @@ struct GenerationConfig {
 // Terrain generator class that manages the generation process
 class TerrainGenerator {
 private:
-	GenerationConfig config_;
+	const GenerationConfig &config_;
 	Xoroshiro128PP master_rng_;
 
 public:
diff --git a/tilemap/src/generation.cpp b/tilemap/src/generation.cpp
index 260649d..96a270f 100644
--- a/tilemap/src/generation.cpp
+++ b/tilemap/src/generation.cpp
@@ -2,9 +2,10 @@
 
 namespace istd {
 TerrainGenerator::TerrainGenerator(const GenerationConfig &config)
-	: config_(config), master_rng_(config.seed) {}
+	: config_(config) {}
 
 void TerrainGenerator::operator()(TileMap &tilemap) {
+	master_rng_ = Xoroshiro128PP(config_.seed);
 	biome_pass(tilemap);
 	base_tile_type_pass(tilemap);
 	smoothen_mountains_pass(tilemap);