diff --git a/src/Bijectors.jl b/src/Bijectors.jl
index 0ef63a2d..50a8f07e 100644
--- a/src/Bijectors.jl
+++ b/src/Bijectors.jl
@@ -82,6 +82,10 @@ if VERSION < v"1.1"
     using Compat: eachcol
 end
 
+if VERSION < v"1.9"
+    using Compat: stack
+end
+
 const DEBUG = Bool(parse(Int, get(ENV, "DEBUG_BIJECTORS", "0")))
 _debug(str) = @debug str