diff --git a/include/polarssl/asn1.h b/include/polarssl/asn1.h
index 0bfa929348..5f236a5913 100644
--- a/include/polarssl/asn1.h
+++ b/include/polarssl/asn1.h
@@ -60,7 +60,7 @@
 
 /**
  * \name DER constants
- * These constants comply with DER encoded the ANS1 type tags.
+ * These constants comply with the DER encoded ASN.1 type tags.
  * DER encoding uses hexadecimal representation.
  * An example DER sequence is:\n
  * - 0x02 -- tag indicating INTEGER