diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index 20b663e..83d5b6a 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -142,10 +142,11 @@
 } mbedtls_ecp_curve_type;
 
 /*
- * Curve moduli types
+ * Curve modulus types
  */
 typedef enum {
-    MBEDTLS_ECP_MOD_COORDINATE = 0,
+    MBEDTLS_ECP_MOD_NONE = 0,
+    MBEDTLS_ECP_MOD_COORDINATE,
     MBEDTLS_ECP_MOD_SCALAR
 } mbedtls_ecp_modulus_type;