diff --git a/library/asn1write.c b/library/asn1write.c
index f08e105..07a3fbb 100644
--- a/library/asn1write.c
+++ b/library/asn1write.c
@@ -142,7 +142,7 @@
 }
 
 int asn1_write_algorithm_identifier( unsigned char **p, unsigned char *start,
-                                     const char *algorithm_oid )
+                                     const char *oid )
 {
     int ret;
     size_t null_len = 0;
@@ -155,7 +155,7 @@
 
     // Write OID
     //
-    ASN1_CHK_ADD( oid_len, asn1_write_oid( p, start, algorithm_oid ) );
+    ASN1_CHK_ADD( oid_len, asn1_write_oid( p, start, oid ) );
 
     len = oid_len + null_len;
     ASN1_CHK_ADD( len, asn1_write_len( p, start, oid_len + null_len ) );