diff --git a/lib/random/formatter.rb b/lib/random/formatter.rb
index 0e80bd0f70..d7e7b1f77a 100644
--- a/lib/random/formatter.rb
+++ b/lib/random/formatter.rb
@@ -3,7 +3,7 @@
 
 # == Random number formatter.
 #
-# Formats generated random numbers in many manors.
+# Formats generated random numbers in many manners.
 #
 # === Examples
 #