diff --git a/nim.cfg b/nim.cfg
index efd5151a2..72db90c87 100644
--- a/nim.cfg
+++ b/nim.cfg
@@ -32,7 +32,8 @@
   --passC:"-march=native"
   @if windows:
     # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65782
-    --passC:"-fno-asynchronous-unwind-tables"
+    # ("-fno-asynchronous-unwind-tables" breaks Nim's exception raising, sometimes)
+    --passC:"-mno-avx512vl"
   @end
 @end