diff --git a/Utility/WinProcess.hs b/Utility/WinProcess.hs
index 36f079d041..cfac8794c4 100644
--- a/Utility/WinProcess.hs
+++ b/Utility/WinProcess.hs
@@ -11,5 +11,5 @@ module Utility.WinProcess where
 
 import Utility.PID
 
-foreign import ccall unsafe "terminatepid"
+foreign import ccall unsafe "winprocess.h terminatepid"
 	terminatePID :: PID -> IO ()
diff --git a/Utility/winprocess.h b/Utility/winprocess.h
new file mode 100644
index 0000000000..eac954fcae
--- /dev/null
+++ b/Utility/winprocess.h
@@ -0,0 +1,3 @@
+#include <windows.h>
+
+void terminatepid (DWORD pid);