diff --git a/src/Ratios.jl b/src/Ratios.jl
index 81a12a1..5c79807 100644
--- a/src/Ratios.jl
+++ b/src/Ratios.jl
@@ -1,3 +1,5 @@
+__precompile__()
+
 module Ratios
 
 import Base: convert, promote_rule, *, /, +, -, ^, ==