diff --git a/crypto/x509/x509_vfy.c b/crypto/x509/x509_vfy.c
index b32c47b31b9a95b5d7a695d99c872b9b6938c316..18048da68c7fea7bd53ead71a5a4fed4be9a77d4 100644
--- a/crypto/x509/x509_vfy.c
+++ b/crypto/x509/x509_vfy.c
@@ -1774,7 +1774,7 @@ int X509_cmp_time(const ASN1_TIME *ctm, time_t *cmp_time)
 	atm.length=sizeof(buff2);
 	atm.data=(unsigned char *)buff2;
 
-	if (X509_time_adj(&atm,-offset*60, cmp_time) == NULL)
+	if (X509_time_adj(&atm, offset*60, cmp_time) == NULL)
 		return 0;
 
 	if (ctm->type == V_ASN1_UTCTIME)