--- ./dist/Storable/stacksize.orig	2020-06-14 23:01:25.000000000 +0000
+++ ./dist/Storable/stacksize	2020-10-27 10:57:33.147900085 +0000
@@ -164,8 +164,8 @@ my $max_depth_hash = $n;
 # be fairly aggressive in trimming this, smoke testing showed
 # several apparently random failures here, eg. working in one
 # configuration, but not in a very similar configuration.
-$max_depth = int(0.6 * $max_depth);
-$max_depth_hash = int(0.6 * $max_depth_hash);
+$max_depth = int(0.6 * $max_depth) & ~31;
+$max_depth_hash = int(0.6 * $max_depth_hash) & ~31;
 
 my $stack_reserve = $^O eq "MSWin32" ? 32 : 16;
 if ($] ge "5.016" && !($^O eq "cygwin" && $ptrsize == 8)) {