diff --git a/mongoose.h b/mongoose.h
index 2beeaeb9bb2270c803322abac3179d91c1d18c4b..0e7343292bc5141fa588bd734bb253b2e82ea47b 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -174,7 +174,8 @@ const char *mg_get_option(const struct mg_context *ctx, const char *name);
 
 
 // Return array of strings that represent valid configuration options.
-// For each option, a short name, long name, and default value is returned.
+// For each option, option name and default value is returned, i.e. the
+// number of entries in the array equals to number_of_options x 2.
 // Array is NULL terminated.
 const char **mg_get_valid_option_names(void);