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-rw-r--r--src/ChunkMap.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index 595040a54..8a8f17a1b 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -822,6 +822,7 @@ void cChunkMap::WakeUpSimulatorsInArea(int a_MinBlockX, int a_MaxBlockX, int a_M
int MinChunkX, MinChunkZ, MaxChunkX, MaxChunkZ;
cChunkDef::BlockToChunk(a_MinBlockX, a_MinBlockZ, MinChunkX, MinChunkZ);
cChunkDef::BlockToChunk(a_MaxBlockX, a_MaxBlockZ, MaxChunkX, MaxChunkZ);
+ cCSLock Lock(m_CSLayers);
for (int z = MinChunkZ; z <= MaxChunkZ; z++)
{
int MinZ = std::max(a_MinBlockZ, z * cChunkDef::Width);