diff --git a/src/os_win32.c b/src/os_win32.c
index fcfafa0..9395638 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -135,6 +135,8 @@
 typedef int SE_OBJECT_TYPE;
 typedef int PSNSECINFO;
 typedef int PSNSECINFOW;
+typedef int STARTUPINFO;
+typedef int PROCESS_INFORMATION;
 #endif
 
 #ifndef FEAT_GUI_W32