1 files changed, 4 insertions, 1 deletions
diff --git a/crypto/asn1/tasn_enc.c b/crypto/asn1/tasn_enc.c
index 3ea18b0280dd..fb2e040c7c56 100644
--- a/crypto/asn1/tasn_enc.c
+++ b/crypto/asn1/tasn_enc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2000-2025 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -571,6 +571,9 @@ static int asn1_ex_i2c(const ASN1_VALUE **pval, unsigned char *cout, int *putype
             return -1;
         break;
 
+    case V_ASN1_UNDEF:
+        return -2;
+
     case V_ASN1_NULL:
         cont = NULL;
         len = 0;