diff --git a/src/common/Collision/Management/MMapMgr.cpp b/src/common/Collision/Management/MMapMgr.cpp
index 480a2db2d..e08ecba79 100644
--- a/src/common/Collision/Management/MMapMgr.cpp
+++ b/src/common/Collision/Management/MMapMgr.cpp
@@ -23,8 +23,8 @@
 
 namespace MMAP
 {
-    static char const* const MAP_FILE_NAME_FORMAT = "%s/mmaps/%03i.mmap";
-    static char const* const TILE_FILE_NAME_FORMAT = "%s/mmaps/%03i%02i%02i.mmtile";
+    static char const* const MAP_FILE_NAME_FORMAT = "{}/mmaps/{:03}.mmap";
+    static char const* const TILE_FILE_NAME_FORMAT = "{}/mmaps/{:03}{:02}{:02}.mmtile";
 
     // ######################## MMapMgr ########################
     MMapMgr::~MMapMgr()