diff --git a/include/openssl/x509.h b/include/openssl/x509.h
index 88455dd..44b3b7b 100644
--- a/include/openssl/x509.h
+++ b/include/openssl/x509.h
@@ -1246,5 +1246,6 @@
 #define X509_R_WRONG_LOOKUP_TYPE 133
 #define X509_R_WRONG_TYPE 134
 #define X509_R_NAME_TOO_LONG 135
+#define X509_R_INVALID_PARAMETER 136
 
 #endif