diff --git a/src/build-mkcl.lsp b/src/build-mkcl.lsp
index 0985d612e5eccb6b36b1a33bbc9a22d49bc2df57..3bb20266864db9278fbeb105d994db1cf8d2cd7b 100644
--- a/src/build-mkcl.lsp
+++ b/src/build-mkcl.lsp
@@ -50,7 +50,7 @@
 #+windows
 (unless (compiler::build-program
 	 "bin/mkcl"
-	 :extra-ld-flags "-Wl,--stack,0x800000" ;; Stack of 8MB.
+;;	 :extra-ld-flags "-Wl,--stack,0x800000" ;; Stack of 8MB. ;; behaves badly on MinGW64. 
 	 :epilogue-code '(PROGN (UNLESS (IGNORE-ERRORS (REQUIRE "CMP"))
 					(TERPRI)
 					(PRINC ";;; Failed to load compiler module!")