diff --git a/Library/Homebrew/dev-cmd/bump.rb b/Library/Homebrew/dev-cmd/bump.rb
index b379ff33fc..e8fcda72db 100644
--- a/Library/Homebrew/dev-cmd/bump.rb
+++ b/Library/Homebrew/dev-cmd/bump.rb
@@ -29,7 +29,7 @@ module Homebrew
     requested_formula&.downcase!
 
     if requested_formula && !get_formula_details(requested_formula)
-      ohai "Requested formula #{requested_formula} is not valid Homebrew formula."
+      raise FormulaUnavailableError, requested_formula
       return
     end