diff --git a/tools/winapi/win32.api b/tools/winapi/win32.api
index 2eb5979cf62..e5a7df8217c 100644
--- a/tools/winapi/win32.api
+++ b/tools/winapi/win32.api
@@ -763,6 +763,7 @@ HWND
 IMAGEHLP_SYMBOL_TYPE_INFO
 MINIDUMP_TYPE
 ULONG
+unsigned short
 
 %longlong
 
@@ -773,6 +774,7 @@ ULONG64
 
 DWORD64 *
 LPAPI_VERSION
+LPEXT_API_VERSION
 LPSTACKFRAME
 LPSTACKFRAME64
 LPVOID
@@ -813,6 +815,7 @@ PSYMBOL_REGISTERED_CALLBACK64
 PTRANSLATE_ADDRESS_ROUTINE
 PTRANSLATE_ADDRESS_ROUTINE64
 PVOID
+PWINDBG_EXTENSION_APIS
 ULONG *
 char **
 void *
@@ -826,6 +829,10 @@ PCSTR
 PSTR
 char *
 
+%void
+
+void
+
 %%dciman32.dll
 
 %long