diff --git a/Modules/_winapi.c b/Modules/_winapi.c
index ca16b06f83010a..985706737c5a36 100644
--- a/Modules/_winapi.c
+++ b/Modules/_winapi.c
@@ -3173,10 +3173,7 @@ static int winapi_exec(PyObject *m)
     WINAPI_CONSTANT(F_DWORD, ERROR_MORE_DATA);
     WINAPI_CONSTANT(F_DWORD, ERROR_NETNAME_DELETED);
     WINAPI_CONSTANT(F_DWORD, ERROR_NO_SYSTEM_RESOURCES);
-    WINAPI_CONSTANT(F_DWORD, ERROR_MORE_DATA);
-    WINAPI_CONSTANT(F_DWORD, ERROR_NETNAME_DELETED);
     WINAPI_CONSTANT(F_DWORD, ERROR_NO_DATA);
-    WINAPI_CONSTANT(F_DWORD, ERROR_NO_SYSTEM_RESOURCES);
     WINAPI_CONSTANT(F_DWORD, ERROR_OPERATION_ABORTED);
     WINAPI_CONSTANT(F_DWORD, ERROR_PIPE_BUSY);
     WINAPI_CONSTANT(F_DWORD, ERROR_PIPE_CONNECTED);