diff --git a/programs/zstd.1.md b/programs/zstd.1.md
index 184db049f..f56110100 100644
--- a/programs/zstd.1.md
+++ b/programs/zstd.1.md
@@ -164,6 +164,7 @@ the last one takes effect.
 * `--max`:
     set advanced parameters to maximum compression.
     warning: this setting uses a lot of resources and is very slow.
+    note that the amount of resource required is typically too large for 32-bit.
 * `-D DICT`:
     use `DICT` as Dictionary to compress or decompress FILE(s)
 * `--patch-from FILE`: