diff --git a/primedev/Northstar.cmake b/primedev/Northstar.cmake
index 50b6adfdb..433326c2b 100644
--- a/primedev/Northstar.cmake
+++ b/primedev/Northstar.cmake
@@ -150,8 +150,8 @@ add_library(
     "util/wininfo.cpp"
     "util/wininfo.h"
     "dllmain.cpp"
-    "dllmain.h"
     "ns_version.h"
+    "Northstar.def"
     )
 
 target_link_libraries(
diff --git a/primedev/Northstar.def b/primedev/Northstar.def
new file mode 100644
index 000000000..4e3c53182
--- /dev/null
+++ b/primedev/Northstar.def
@@ -0,0 +1,4 @@
+LIBRARY dedicated
+
+EXPORTS
+    InitialiseNorthstar @1
diff --git a/primedev/dllmain.cpp b/primedev/dllmain.cpp
index 3d9bdc974..a656dac7a 100644
--- a/primedev/dllmain.cpp
+++ b/primedev/dllmain.cpp
@@ -1,4 +1,3 @@
-#include "dllmain.h"
 #include "logging/logging.h"
 #include "logging/crashhandler.h"
 #include "core/memalloc.h"
diff --git a/primedev/dllmain.h b/primedev/dllmain.h
deleted file mode 100644
index 0debf379c..000000000
--- a/primedev/dllmain.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#pragma once
-
-extern "C" __declspec(dllexport) bool InitialiseNorthstar();