diff --git a/README.md b/README.md
index 186955e..38d4ff9 100644
--- a/README.md
+++ b/README.md
@@ -19,16 +19,17 @@ Double Exchange Hamiltonian: Complete Version
 
   1. Export environment variables for PETSc and SLEPc
 
-	```shell
-	export PETSC_DIR=${PATH_TO_PETSC_INSTALLATION}
-	export SLEPC_DIR=${PATH_TO_SLEPC_INSTALLATION}
-	```
+```shell
+export PETSC_DIR=${PATH_TO_PETSC_INSTALLATION}
+export SLEPC_DIR=${PATH_TO_SLEPC_INSTALLATION}
+export C_INCLUDE_PATH+=:$PETSC_DIR/include/:$SLEPC_DIR/include:$PETSC_DIR/arch-linux2-c-debug/include/:$SLEPC_DIR/arch-linux2-c-debug/include
+```
 
   2. Make the executable
 
-	```shell
-	make ex1
-	```
+```shell
+make ex1
+```
 
 3. Using DEHam
 ---------------
@@ -37,25 +38,25 @@ Double Exchange Hamiltonian: Complete Version
    has the topology of the Hamiltonian and the various parameters
    as explained below in a sample inputfile:
 
-	```python
-	140					# The total number of determinants
-	7					# The largest number of non-zero elements per row
-	2					# The number of processors used in parallel
-	1					# The number of holes
-	0					# The isz (ms-1/2) value
-	1,2,3,1,2,3,4,5,6,7	# The topology of the system is specified here
-	2,3,4,8,7,6,5,6,7,8	# first and second line contain the two sites linked
-	1,1,1,2,2,2,2,3,3,3	# third line contains the type of link (1 for t, J 2 for K and 3 for none)
-	.1430,-0.20,0.0000	# The three types of links this line gives J, K
-	.1430,-0.20,0.0000	# 
-	-1.00,0.0,0.00		# This line gives t
-	```
+```python
+140					# The total number of determinants
+7					# The largest number of non-zero elements per row
+2					# The number of processors used in parallel
+1					# The number of holes
+0					# The isz (ms-1/2) value
+1,2,3,1,2,3,4,5,6,7	# The topology of the system is specified here
+2,3,4,8,7,6,5,6,7,8	# first and second line contain the two sites linked
+1,1,1,2,2,2,2,3,3,3	# third line contains the type of link (1 for t, J 2 for K and 3 for none)
+.1430,-0.20,0.0000	# The three types of links this line gives J, K
+.1430,-0.20,0.0000	# 
+-1.00,0.0,0.00		# This line gives t
+```
 
   2. running DEHam
 
-	```shell
-	mpiexec -n [nprocs] ./ex1 inpfile 
-	```
+```shell
+mpiexec -n [nprocs] ./ex1 inpfile 
+```
 
 4. Publications using this code
 -------------------------------