Fixed to the features check
diff --git a/include/polarssl/version.h b/include/polarssl/version.h
index 1c504fa..8527dd2 100644
--- a/include/polarssl/version.h
+++ b/include/polarssl/version.h
@@ -99,7 +99,9 @@
*
* \param feature The string for the define to check (e.g. "POLARSSL_AES_C")
*
- * \return 0 if the feature is present, -1 if not.
+ * \return 0 if the feature is present, -1 if the feature is not
+ * present and -2 if support for feature checking as a whole
+ * was not compiled in.
*/
int version_check_feature( const char *feature );