diff --git a/Modules/_winapi.c b/Modules/_winapi.c
index 724a478..b755178 100644
--- a/Modules/_winapi.c
+++ b/Modules/_winapi.c
@@ -1343,6 +1343,7 @@
     WINAPI_CONSTANT(F_DWORD, STILL_ACTIVE);
     WINAPI_CONSTANT(F_DWORD, SW_HIDE);
     WINAPI_CONSTANT(F_DWORD, WAIT_OBJECT_0);
+    WINAPI_CONSTANT(F_DWORD, WAIT_ABANDONED_0);
     WINAPI_CONSTANT(F_DWORD, WAIT_TIMEOUT);
 
     WINAPI_CONSTANT("i", NULL);