diff --git a/crypto/x509v3/v3_enum.c b/crypto/x509v3/v3_enum.c
index f927110e15f14fb1f77474dc04df535b044cd503..aecfdc87f82e1a212698e44dd9f4bed95e950682 100644
--- a/crypto/x509v3/v3_enum.c
+++ b/crypto/x509v3/v3_enum.c
@@ -79,7 +79,7 @@ NID_crl_reason, 0,
 (X509V3_EXT_D2I)d2i_ASN1_ENUMERATED,
 (X509V3_EXT_I2D)i2d_ASN1_ENUMERATED,
 (X509V3_EXT_I2S)i2s_ASN1_ENUMERATED_TABLE,
-(X509V3_EXT_S2I)NULL,
+(X509V3_EXT_S2I)0,
 NULL, NULL, NULL, NULL, crl_reasons};
 
 
diff --git a/crypto/x509v3/v3_int.c b/crypto/x509v3/v3_int.c
index a2edfe5463906045378f4d44596ee241a6a20095..63c201e5f409163169e218e7fd4a9d6e85a613d9 100644
--- a/crypto/x509v3/v3_int.c
+++ b/crypto/x509v3/v3_int.c
@@ -67,6 +67,6 @@ NID_crl_number, 0,
 (X509V3_EXT_D2I)d2i_ASN1_INTEGER,
 (X509V3_EXT_I2D)i2d_ASN1_INTEGER,
 (X509V3_EXT_I2S)i2s_ASN1_INTEGER,
-(X509V3_EXT_S2I)NULL,
+(X509V3_EXT_S2I)0,
 NULL, NULL, NULL, NULL, NULL};