diff --git a/src/PDMats.jl b/src/PDMats.jl
index e156914..681ae7b 100644
--- a/src/PDMats.jl
+++ b/src/PDMats.jl
@@ -1,3 +1,5 @@
+VERSION >= v"0.4.0-dev+6521" && __precompile__(true)
+
 module PDMats
 
     using ArrayViews