1 files changed, 3 insertions, 2 deletions
diff --git a/rational.c b/rational.c
index 74a0eab219..477ee11a6d 100644
--- a/rational.c
+++ b/rational.c
@@ -2465,13 +2465,14 @@ nurat_s_convert(int argc, VALUE *argv, VALUE klass)
  * a/b (b>0).  Where a is numerator and b is denominator.  Integer a
  * equals rational a/1 mathematically.
  *
- * In ruby, you can create rational object with Rational, to_r or
- * rationalize method.  The return values will be irreducible.
+ * In ruby, you can create rational object with Rational, to_r, 
+ * rationalize method or suffixing r to a literal.  The return values will be irreducible.
  *
  *    Rational(1)      #=> (1/1)
  *    Rational(2, 3)   #=> (2/3)
  *    Rational(4, -6)  #=> (-2/3)
  *    3.to_r           #=> (3/1)
+ *    2/3r             #=> (2/3)
  *
  * You can also create rational object from floating-point numbers or
  * strings.