diff --git a/include/polarssl/ecp.h b/include/polarssl/ecp.h
index ff1072e..eea4c6d 100644
--- a/include/polarssl/ecp.h
+++ b/include/polarssl/ecp.h
@@ -215,7 +215,7 @@
 /**
  * \brief           Get curve information from a TLS NamedCurve value
  *
- * \param grp_id    A POLARSSL_ECP_DP_XXX value
+ * \param tls_id    A POLARSSL_ECP_DP_XXX value
  *
  * \return          The associated curve information or NULL
  */