diff --git a/osslsigncode.c b/osslsigncode.c
index 450424b..c57de39 100644
--- a/osslsigncode.c
+++ b/osslsigncode.c
@@ -4453,7 +4453,8 @@ static int cat_verify_member(CatalogAuthAttr *attribute, char *indata, FILE_HEAD
 					goto out;
 				break;
 			default:
-				break;
+				printf("Unsupported input file type.\n");
+				goto out;
 			}
 		mdlen = EVP_MD_size(EVP_get_digestbynid(mdtype));
 		if (!memcmp(mdbuf, cmdbuf, (size_t)mdlen)) {