diff --git a/util/cbfstool/cbfs_image.c b/util/cbfstool/cbfs_image.c
index bc5c5d7dec..bf01c9676d 100644
--- a/util/cbfstool/cbfs_image.c
+++ b/util/cbfstool/cbfs_image.c
@@ -692,7 +692,7 @@ int cbfs_export_entry(struct cbfs_image *image, const char *entry_name,
 	buffer.data = malloc(decompressed_size);
 	buffer.size = decompressed_size;
 	if (decompress(CBFS_SUBHEADER(entry), ntohl(entry->len),
-		buffer.data, buffer.size)) {
+		buffer.data, buffer.size, NULL)) {
 		ERROR("decompression failed for %s\n", entry_name);
 		return -1;
 	}
diff --git a/util/cbfstool/common.h b/util/cbfstool/common.h
index e889e52704..4920d76f59 100644
--- a/util/cbfstool/common.h
+++ b/util/cbfstool/common.h
@@ -153,7 +153,8 @@ typedef int (*comp_func_ptr) (char *in, int in_len, char *out, int *out_len);
  * Returns 0 on error,
  *         != 0 otherwise, depending on the decompressing function.
  */
-typedef int (*decomp_func_ptr) (char *in, int in_len, char *out, int out_len);
+typedef int (*decomp_func_ptr) (char *in, int in_len, char *out, int out_len,
+				size_t *actual_size);
 
 enum comp_algo { CBFS_COMPRESS_NONE = 0, CBFS_COMPRESS_LZMA = 1 };
 
@@ -187,7 +188,8 @@ void print_supported_filetypes(void);
 
 /* lzma/lzma.c */
 int do_lzma_compress(char *in, int in_len, char *out, int *out_len);
-int do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len);
+int do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len,
+			size_t *actual_size);
 
 /* xdr.c */
 struct xdr {
diff --git a/util/cbfstool/compress.c b/util/cbfstool/compress.c
index 2bde7df96a..0313b96898 100644
--- a/util/cbfstool/compress.c
+++ b/util/cbfstool/compress.c
@@ -31,9 +31,10 @@ static int lzma_compress(char *in, int in_len, char *out, int *out_len)
 	return do_lzma_compress(in, in_len, out, out_len);
 }
 
-static int lzma_decompress(char *in, int in_len, char *out, unused int out_len)
+static int lzma_decompress(char *in, int in_len, char *out, unused int out_len,
+				size_t *actual_size)
 {
-	return do_lzma_uncompress(out, out_len, in, in_len);
+	return do_lzma_uncompress(out, out_len, in, in_len, actual_size);
 }
 static int none_compress(char *in, int in_len, char *out, int *out_len)
 {
@@ -42,9 +43,12 @@ static int none_compress(char *in, int in_len, char *out, int *out_len)
 	return 0;
 }
 
-static int none_decompress(char *in, int in_len, char *out, unused int out_len)
+static int none_decompress(char *in, int in_len, char *out, unused int out_len,
+				size_t *actual_size)
 {
 	memcpy(out, in, in_len);
+	if (actual_size != NULL)
+		*actual_size = in_len;
 	return 0;
 }
 
diff --git a/util/cbfstool/lzma/lzma.c b/util/cbfstool/lzma/lzma.c
index 856932d22e..986ebfaa22 100644
--- a/util/cbfstool/lzma/lzma.c
+++ b/util/cbfstool/lzma/lzma.c
@@ -152,7 +152,8 @@ int do_lzma_compress(char *in, int in_len, char *out, int *out_len)
 	return 0;
 }
 
-int do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len)
+int do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len,
+			size_t *actual_size)
 {
 	if (src_len <= LZMA_PROPS_SIZE + 8) {
 		ERROR("LZMA: Input length is too small.\n");
@@ -184,5 +185,8 @@ int do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len)
 		return -1;
 	}
 
+	if (actual_size != NULL)
+		*actual_size = destlen;
+
 	return 0;
 }