diff --git a/complex.c b/complex.c
index 2f8b6a808e..de3d16b541 100644
--- a/complex.c
+++ b/complex.c
@@ -1473,7 +1473,7 @@ string_to_c_strict(VALUE self)
  * Returns a complex which denotes the string form.  The parser
  * ignores leading whitespaces and trailing garbage.  Any digit
  * sequences can be separeted by an underscore.  Returns zero for null
- * string.
+ * or garbage string.
  *
  * For example:
  *