diff --git a/lib/rake/extensiontask.rb b/lib/rake/extensiontask.rb
index d85b1a3..b0ab88e 100644
--- a/lib/rake/extensiontask.rb
+++ b/lib/rake/extensiontask.rb
@@ -26,6 +26,7 @@ def init(name = nil, gem_spec = nil)
       @no_native = false
       @config_includes = []
       @ruby_versions_per_platform = {}
+      @make = nil
     end
 
     def cross_platform