diff --git a/src/pylib/Lib/datetime_impl/datetime_impl/meth/struct_tm_decl.nim b/src/pylib/Lib/datetime_impl/datetime_impl/meth/struct_tm_decl.nim
index 206bf0ff4..1684c0139 100644
--- a/src/pylib/Lib/datetime_impl/datetime_impl/meth/struct_tm_decl.nim
+++ b/src/pylib/Lib/datetime_impl/datetime_impl/meth/struct_tm_decl.nim
@@ -37,4 +37,4 @@ else:
 func initTm*(tm: var Tm) =
   # a workaround for compile error
   tm.tm_mday = 1
-func initTm*: Tm = result.initTm()
+func initTm*: Tm = result.tm_mday = 1