diff --git a/src/common/Collision/Maps/MapDefines.h b/src/common/Collision/Maps/MapDefines.h
index a40437689..2700878e6 100644
--- a/src/common/Collision/Maps/MapDefines.h
+++ b/src/common/Collision/Maps/MapDefines.h
@@ -26,7 +26,7 @@
 #define SIZE_OF_GRIDS            533.3333f
 
 #define MMAP_MAGIC 0x4d4d4150   // 'MMAP'
-#define MMAP_VERSION 17
+#define MMAP_VERSION 18
 
 struct MmapTileRecastConfig
 {
diff --git a/src/tools/mmaps_generator/Config.cpp b/src/tools/mmaps_generator/Config.cpp
index 3e5ca92dc..f815139d2 100644
--- a/src/tools/mmaps_generator/Config.cpp
+++ b/src/tools/mmaps_generator/Config.cpp
@@ -25,7 +25,7 @@ namespace MMAP
 {
     float ComputeBaseUnitDim(int vertexPerMapEdge)
     {
-        return GRID_SIZE / static_cast<float>(vertexPerMapEdge - 1);
+        return GRID_SIZE / static_cast<float>(vertexPerMapEdge);
     }
 
     std::pair<uint32, uint32> MakeTileKey(uint32 x, uint32 y)