diff --git a/vxworks-6.9/target/src/openssl/OPENSSL/openssl-3.5.0/apps/dgst.c b/vxworks-6.9/target/src/openssl/OPENSSL/openssl-3.5.0/apps/dgst.c
index 0fb1f452..3ac1ae43 100644
--- a/vxworks-6.9/target/src/openssl/OPENSSL/openssl-3.5.0/apps/dgst.c
+++ b/vxworks-6.9/target/src/openssl/OPENSSL/openssl-3.5.0/apps/dgst.c
@@ -117,6 +117,8 @@ int dgst_main(int argc, char **argv)
     EVP_MD_CTX *signctx = NULL;
     int oneshot_sign = 0;
 
+    reset_unknown();
+
     buf = app_malloc(BUFSIZE, "I/O buffer");
     md = (EVP_MD *)EVP_get_digestbyname(argv[0]);
     if (md != NULL)