diff --git a/LUDecomp.cpp b/LUDecomp.cpp
index aa85827..189380c 100644
--- a/LUDecomp.cpp
+++ b/LUDecomp.cpp
@@ -27,7 +27,7 @@
 // matrix LU decomposition class
 //
 
-#include "stdafx.h"
+#include "STDAFX.H"
 
 #include <cmath>
 
diff --git a/Mtx.cpp b/Mtx.cpp
index 31f566c..cadd7b0 100644
--- a/Mtx.cpp
+++ b/Mtx.cpp
@@ -27,7 +27,7 @@
 // basic numerical matrix class
 //
 
-#include "stdafx.h"
+#include "STDAFX.H"
 
 #include "Mtx.h"
 
diff --git a/Vect.cpp b/Vect.cpp
index 5401f5c..023f403 100644
--- a/Vect.cpp
+++ b/Vect.cpp
@@ -27,9 +27,9 @@
 // basic numerical vector class
 //
 
-#include "stdafx.h"
 
 #include "Vect.h"
+#include "STDAFX.H"
 
 using namespace std;