diff --git a/dll.vcxproj b/dll.vcxproj
index 746de67b..b6cfe110 100644
--- a/dll.vcxproj
+++ b/dll.vcxproj
@@ -95,7 +95,7 @@
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;LIBMDBX_EXPORTS;%(PreprocessorDefinitions);MDBX_DEBUG=1</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;LIBMDBX_EXPORTS;MDBX_BUILD_DLL;%(PreprocessorDefinitions);MDBX_DEBUG=1</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
       <WarningLevel>EnableAllWarnings</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
@@ -111,7 +111,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;LIBMDBX_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;LIBMDBX_EXPORTS;MDBX_BUILD_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
       <WarningLevel>EnableAllWarnings</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
@@ -140,7 +140,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
       <WarningLevel>EnableAllWarnings</WarningLevel>
-      <PreprocessorDefinitions>WIN64;_DEBUG;_WINDOWS;_USRDLL;LIBMDBX_EXPORTS;%(PreprocessorDefinitions);MDBX_DEBUG=1</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN64;_DEBUG;_WINDOWS;_USRDLL;LIBMDBX_EXPORTS;MDBX_BUILD_DLL;%(PreprocessorDefinitions);MDBX_DEBUG=1</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
       <StringPooling>true</StringPooling>
       <TreatWarningAsError>true</TreatWarningAsError>
@@ -148,7 +148,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
     <ClCompile>
-      <PreprocessorDefinitions>WIN64;NDEBUG;_WINDOWS;_USRDLL;LIBMDBX_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN64;NDEBUG;_WINDOWS;_USRDLL;LIBMDBX_EXPORTS;MDBX_BUILD_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
       <StringPooling>true</StringPooling>
       <Optimization>Full</Optimization>
diff --git a/mdbx.h b/mdbx.h
index ec283111..ddf1a040 100644
--- a/mdbx.h
+++ b/mdbx.h
@@ -207,6 +207,7 @@ extern LIBMDBX_API const mdbx_version_info mdbx_version;
 extern LIBMDBX_API const mdbx_build_info mdbx_build;
 
 #if defined(_WIN32) || defined(_WIN64)
+#ifndef MDBX_BUILD_DLL
 
 /* Dll initialization callback for ability to dynamically load MDBX DLL by
  * LoadLibrary() on Windows versions before Windows Vista. This function MUST be
@@ -222,6 +223,7 @@ extern LIBMDBX_API const mdbx_build_info mdbx_build;
 void LIBMDBX_API NTAPI mdbx_dll_callback(PVOID module, DWORD reason,
                                          PVOID reserved);
 #endif /* MDBX_CONFIG_MANUAL_TLS_CALLBACK */
+#endif /* MDBX_BUILD_DLL */
 #endif /* Windows */
 
 /* The name of the lock file in the DB environment */
diff --git a/src/lck-windows.c b/src/lck-windows.c
index 7da07559..dcadcb6e 100644
--- a/src/lck-windows.c
+++ b/src/lck-windows.c
@@ -26,11 +26,16 @@
 
 static void mdbx_winnt_import(void);
 
+#ifdef MDBX_BUILD_DLL
+BOOL APIENTRY DllMain(HANDLE module, DWORD reason, LPVOID reserved)
+#else
 #if !MDBX_CONFIG_MANUAL_TLS_CALLBACK
 static
 #endif /* !MDBX_CONFIG_MANUAL_TLS_CALLBACK */
     void NTAPI
-    mdbx_dll_callback(PVOID module, DWORD reason, PVOID reserved) {
+    mdbx_dll_callback(PVOID module, DWORD reason, PVOID reserved)
+#endif /* MDBX_BUILD_DLL */
+{
   (void)reserved;
   switch (reason) {
   case DLL_PROCESS_ATTACH:
@@ -47,9 +52,12 @@ static
     mdbx_rthc_thread_dtor(module);
     break;
   }
+#ifdef MDBX_BUILD_DLL
+  return TRUE;
+#endif
 }
 
-#if !MDBX_CONFIG_MANUAL_TLS_CALLBACK
+#if !defined(MDBX_BUILD_DLL) && !MDBX_CONFIG_MANUAL_TLS_CALLBACK
 /* *INDENT-OFF* */
 /* clang-format off */
 #if defined(_MSC_VER)
@@ -87,7 +95,7 @@ static
 #endif
 /* *INDENT-ON* */
 /* clang-format on */
-#endif /* !MDBX_CONFIG_MANUAL_TLS_CALLBACK */
+#endif /* !defined(MDBX_BUILD_DLL) && !MDBX_CONFIG_MANUAL_TLS_CALLBACK */
 
 /*----------------------------------------------------------------------------*/