diff --git a/src/openvpn/crypto.c b/src/openvpn/crypto.c
index bd866799..269ec4b5 100644
--- a/src/openvpn/crypto.c
+++ b/src/openvpn/crypto.c
@@ -450,6 +450,13 @@ openvpn_decrypt_aead (struct buffer *buf, struct buffer work,
   tag_ptr = BPTR(buf);
   ASSERT (buf_advance (buf, tag_size));
   dmsg (D_PACKET_CONTENT, "DECRYPT MAC: %s", format_hex (tag_ptr, tag_size, 0, &gc));
+#if defined(ENABLE_CRYPTO_OPENSSL) && OPENSSL_VERSION_NUMBER < 0x10001040L
+  /* OpenSSL <= 1.0.1c bug requires set tag before processing ciphertext */
+  if (!EVP_CIPHER_CTX_ctrl (ctx->cipher, EVP_CTRL_GCM_SET_TAG, tag_size, tag_ptr))
+    {
+      CRYPT_ERROR ("setting tag failed");
+    }
+#endif
 
   if (buf->len < 1)
     {