diff --git a/library/x509parse.c b/library/x509parse.c
index fc84e61..b3725a7 100644
--- a/library/x509parse.c
+++ b/library/x509parse.c
@@ -2521,7 +2521,7 @@
     unsigned char *end2;
 
     /*
-     * RFC 5915, orf SEC1 Appendix C.4
+     * RFC 5915, or SEC1 Appendix C.4
      *
      * ECPrivateKey ::= SEQUENCE {
      *      version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),