diff --git a/Appendix1/appendix1.tex b/Appendix1/appendix1.tex
index 9e3df1f..c56dff0 100644
--- a/Appendix1/appendix1.tex
+++ b/Appendix1/appendix1.tex
@@ -1,3 +1,4 @@
+%!TEX root = ../thesis.tex
 % ******************************* Thesis Appendix A ****************************
 \chapter{How to install \LaTeX} 
 
diff --git a/Appendix2/appendix2.tex b/Appendix2/appendix2.tex
index efd9738..b2f388c 100644
--- a/Appendix2/appendix2.tex
+++ b/Appendix2/appendix2.tex
@@ -1,3 +1,4 @@
+%!TEX root = ../thesis.tex
 % ******************************* Thesis Appendix B ********************************
 
 \chapter{Installing the CUED class file}
diff --git a/Chapter1/chapter1.tex b/Chapter1/chapter1.tex
index 1ed6da0..eb8c1cb 100644
--- a/Chapter1/chapter1.tex
+++ b/Chapter1/chapter1.tex
@@ -1,3 +1,4 @@
+%!TEX root = ../thesis.tex
 %*******************************************************************************
 %*********************************** First Chapter *****************************
 %*******************************************************************************
diff --git a/Chapter2/chapter2.tex b/Chapter2/chapter2.tex
index 0c1e494..5781a74 100644
--- a/Chapter2/chapter2.tex
+++ b/Chapter2/chapter2.tex
@@ -1,3 +1,4 @@
+%!TEX root = ../thesis.tex
 %*******************************************************************************
 %****************************** Second Chapter *********************************
 %*******************************************************************************
diff --git a/Chapter3/chapter3.tex b/Chapter3/chapter3.tex
index dd2920b..82b23c5 100644
--- a/Chapter3/chapter3.tex
+++ b/Chapter3/chapter3.tex
@@ -1,3 +1,7 @@
+%!TEX root = ../thesis.tex
+%*******************************************************************************
+%****************************** Third Chapter **********************************
+%*******************************************************************************
 \chapter{My third chapter}
 
 % **************************** Define Graphics Path **************************