diff --git a/lib/decompress.c b/lib/decompress.c
index 31a8042..f8fdeda 100644
--- a/lib/decompress.c
+++ b/lib/decompress.c
@@ -38,7 +38,7 @@
 	decompress_fn decompressor;
 };
 
-static const struct compress_format compressed_formats[] __initdata = {
+static const struct compress_format compressed_formats[] __initconst = {
 	{ {037, 0213}, "gzip", gunzip },
 	{ {037, 0236}, "gzip", gunzip },
 	{ {0x42, 0x5a}, "bzip2", bunzip2 },