diff --git a/src/Generating/FinishGen.cpp b/src/Generating/FinishGen.cpp
index 656dc95db..59af0fd63 100644
--- a/src/Generating/FinishGen.cpp
+++ b/src/Generating/FinishGen.cpp
@@ -1379,7 +1379,7 @@ eMonsterType cFinishGenPassiveMobs::GetRandomMob(cChunkDesc & a_ChunkDesc)
 	using diff_type =
 		std::iterator_traits<decltype(MobIter)>::difference_type;
 	diff_type RandMob = static_cast<diff_type>
-		((unsigned long)(m_Noise.IntNoise2DInt(chunkX - chunkZ + 2, chunkX + 5) / 7)
+		(static_cast<size_t>(m_Noise.IntNoise2DInt(chunkX - chunkZ + 2, chunkX + 5) / 7)
 		% ListOfSpawnables.size());
 	std::advance(MobIter, RandMob);