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-rw-r--r--src/tools/vmap4_assembler/TileAssembler.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/tools/vmap4_assembler/TileAssembler.cpp b/src/tools/vmap4_assembler/TileAssembler.cpp
index fea6f038ad2..b3a0af3f008 100644
--- a/src/tools/vmap4_assembler/TileAssembler.cpp
+++ b/src/tools/vmap4_assembler/TileAssembler.cpp
@@ -27,6 +27,7 @@
#include "VMapDefinitions.h"
#include <boost/filesystem/directory.hpp>
#include <boost/filesystem/operations.hpp>
+#include <mutex>
#include <set>
template<> struct BoundsTrait<VMAP::ModelSpawn*>