diff --git a/Rakefile b/Rakefile
index 4175983..941aca8 100644
--- a/Rakefile
+++ b/Rakefile
@@ -4,7 +4,7 @@ task :default => :test
 # Packaging
 # ==========================================================
 
-GEMSPEC = eval(File.read('posix-spawn.gemspec'))
+GEMSPEC = eval(File.read('posix-spawn.gemspec'), binding, __FILE__, __LINE__)
 
 require 'rubygems/package_task'
 Gem::PackageTask.new(GEMSPEC) do |pkg|
diff --git a/ext/posix-spawn.c b/ext/posix-spawn.c
index 7ff2464..cf1be2c 100644
--- a/ext/posix-spawn.c
+++ b/ext/posix-spawn.c
@@ -196,8 +196,9 @@ posixspawn_file_actions_addopen(VALUE key, VALUE val, posix_spawn_file_actions_t
  * if not.
  */
 static int
-posixspawn_file_actions_operations_iter(VALUE key, VALUE val, posix_spawn_file_actions_t *fops)
+posixspawn_file_actions_operations_iter(VALUE key, VALUE val, VALUE fops_value)
 {
+    posix_spawn_file_actions_t *fops = (posix_spawn_file_actions_t *)fops_value;
 	int act;
 
 	act = posixspawn_file_actions_addclose(key, val, fops);