diff --git a/src/Calculus.jl b/src/Calculus.jl
index 424b458..f38ea28 100644
--- a/src/Calculus.jl
+++ b/src/Calculus.jl
@@ -1,3 +1,5 @@
+isdefined(Base, :__precompile__) && __precompile__()
+
 module Calculus
     import Compat
     import Base.ctranspose