diff --git a/examples/temp_sensor/rakefile_helper.rb b/examples/temp_sensor/rakefile_helper.rb
index 4ab12b2..ff3f089 100644
--- a/examples/temp_sensor/rakefile_helper.rb
+++ b/examples/temp_sensor/rakefile_helper.rb
@@ -185,8 +185,8 @@ module RakefileHelpers
       obj_list = []
 
       # Detect dependencies and build required required modules
-      header_list = extract_headers(test) + ['cmock.h'] + [ $cfg[:cmock][:unity_helper_path] ]
-      header_list.compact.uniq.each do |header|
+      header_list = (extract_headers(test) + ['cmock.h'] + [ $cfg[:cmock][:unity_helper_path] ]).compact.uniq
+      header_list.each do |header|
 
         #create mocks if needed
         if (header =~ /Mock/)