diff --git a/debug/Makefile.am b/debug/Makefile.am
index b935300..71ca7e4 100644
--- a/debug/Makefile.am
+++ b/debug/Makefile.am
@@ -15,7 +15,8 @@
 noinst_PROGRAMS = \
 	repeat \
 	sync_flush \
-	full_flush
+	full_flush \
+	memusage
 
 AM_CPPFLAGS = \
 	-I@top_srcdir@/src/common \
diff --git a/debug/memusage.c b/debug/memusage.c
new file mode 100644
index 0000000..0716f5a
--- /dev/null
+++ b/debug/memusage.c
@@ -0,0 +1,55 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       memusage.c
+/// \brief      Calculates memory usage using lzma_memory_usage()
+///
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "sysdefs.h"
+#include <stdio.h>
+
+int
+main(void)
+{
+
+	lzma_options_lzma lzma = {
+		.dictionary_size = (1 << 27) + (1 << 26),
+		.literal_context_bits = 3,
+		.literal_pos_bits = 0,
+		.pos_bits = 2,
+		.preset_dictionary = NULL,
+		.preset_dictionary_size = 0,
+		.mode = LZMA_MODE_BEST,
+		.fast_bytes = 48,
+		.match_finder = LZMA_MF_BT4,
+		.match_finder_cycles = 0,
+	};
+
+/*
+	lzma_options_filter filters[] = {
+		{ LZMA_FILTER_LZMA,
+			(lzma_options_lzma *)&lzma_preset_lzma[6 - 1] },
+		{ UINT64_MAX, NULL }
+	};
+*/
+	lzma_options_filter filters[] = {
+		{ LZMA_FILTER_LZMA, &lzma },
+		{ UINT64_MAX, NULL }
+	};
+
+	printf("%u MiB\n", lzma_memory_usage(filters, true));
+
+	return 0;
+}