diff --git a/Meshconvert/CmdLineHelpers.h b/Meshconvert/CmdLineHelpers.h
index 2a988e9..b3af3ee 100644
--- a/Meshconvert/CmdLineHelpers.h
+++ b/Meshconvert/CmdLineHelpers.h
@@ -23,6 +23,10 @@
 #include <set>
 #include <string>
 
+#ifndef TOOL_VERSION
+#error Define TOOL_VERSION before including this header
+#endif
+
 
 namespace Helpers
 {
@@ -164,7 +168,7 @@ namespace Helpers
 
         if (!*version || wcscmp(version, L"1.0.0.0") == 0)
         {
-            swprintf_s(version, L"%03d (library)", DIRECTX_MESH_VERSION);
+            swprintf_s(version, L"%03d (library)", TOOL_VERSION);
         }
 
         if (versionOnly)
diff --git a/Meshconvert/Meshconvert.cpp b/Meshconvert/Meshconvert.cpp
index de3a6fa..7d8594b 100644
--- a/Meshconvert/Meshconvert.cpp
+++ b/Meshconvert/Meshconvert.cpp
@@ -47,6 +47,8 @@
 #include <tuple>
 
 #include "Mesh.h"
+
+#define TOOL_VERSION DIRECTX_MESH_VERSION
 #include "CmdLineHelpers.h"
 
 using namespace Helpers;