diff --git a/src/world/Manager/FreeCompanyMgr.cpp b/src/world/Manager/FreeCompanyMgr.cpp
index 563cc35d..b5649b28 100644
--- a/src/world/Manager/FreeCompanyMgr.cpp
+++ b/src/world/Manager/FreeCompanyMgr.cpp
@@ -173,7 +173,7 @@ FreeCompanyPtr FreeCompanyMgr::createFreeCompany( const std::string& name, const
 
   if( !m_fcIdMap.empty() )
   {
-    auto lastIdx = ( --m_fcIdMap.end() )->first;
+    auto lastIdx = ( std::prev( m_fcIdMap.end() ) )->first;
     freeCompanyId = lastIdx + 1;
   }