diff --git a/Utilities/cmlibarchive/libarchive/archive_write_add_filter_xz.c b/Utilities/cmlibarchive/libarchive/archive_write_add_filter_xz.c
index d3e58cefd0..00df8da5ad 100644
--- a/Utilities/cmlibarchive/libarchive/archive_write_add_filter_xz.c
+++ b/Utilities/cmlibarchive/libarchive/archive_write_add_filter_xz.c
@@ -384,6 +384,10 @@ archive_compressor_xz_options(struct archive_write_filter *f,
 		data->compression_level = value[0] - '0';
 		if (data->compression_level > 9)
 			data->compression_level = 9;
+#ifdef _AIX
+		if (data->compression_level > 6)
+			data->compression_level = 6;
+#endif
 		return (ARCHIVE_OK);
 	} else if (strcmp(key, "threads") == 0) {
 		char *endptr;