diff --git a/openssl-sys/src/asn1.rs b/openssl-sys/src/asn1.rs
index 09cfd95a306ef3691cdfe985ad51908dd6b0d394..679cb30b9aac93f23e14b152230f9a2fbc5fcfb3 100644
--- a/openssl-sys/src/asn1.rs
+++ b/openssl-sys/src/asn1.rs
@@ -17,7 +17,7 @@ pub const V_ASN1_ENUMERATED: c_int = 10;
 pub const V_ASN1_UTF8STRING: c_int = 12;
 pub const V_ASN1_SEQUENCE: c_int = 16;
 pub const V_ASN1_SET: c_int = 17;
-pub const V_ASN1_NUMERICSTRING: c_int = 19;
+pub const V_ASN1_NUMERICSTRING: c_int = 18;
 pub const V_ASN1_PRINTABLESTRING: c_int = 19;
 pub const V_ASN1_T61STRING: c_int = 20;
 pub const V_ASN1_TELETEXSTRING: c_int = 20; // alias