diff --git a/common/memory_mapped_file.cpp b/common/memory_mapped_file.cpp
index 357c3fa5d..69c60fb6b 100644
--- a/common/memory_mapped_file.cpp
+++ b/common/memory_mapped_file.cpp
@@ -110,6 +110,7 @@ namespace EQEmu {
         }
         fseek(f, 0U, SEEK_END);
         uint32 size = static_cast<uint32>(ftell(f)) - sizeof(shared_memory_struct);
+        size_ = size;
         fclose(f);
 
 #ifdef _WINDOWS