diff --git a/lib/decompress.c b/lib/decompress.c
index 961f367320fc..d2842f571674 100644
--- a/lib/decompress.c
+++ b/lib/decompress.c
@@ -43,7 +43,7 @@ decompress_fn decompress_method(const unsigned char *inbuf, int len,
 	if (len < 2)
 		return NULL;	/* Need at least this much... */
 
-	for (cf = compressed_formats; cf->decompressor; cf++) {
+	for (cf = compressed_formats; cf->name; cf++) {
 		if (!memcmp(inbuf, cf->magic, 2))
 			break;