diff --git a/freeglut/freeglut/progs/demos/Fractals_random/fractals_random.c b/freeglut/freeglut/progs/demos/Fractals_random/fractals_random.c
index 3ab62c0..176013f 100644
--- a/freeglut/freeglut/progs/demos/Fractals_random/fractals_random.c
+++ b/freeglut/freeglut/progs/demos/Fractals_random/fractals_random.c
@@ -25,7 +25,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
-#ifdef WIN32
+#ifdef _MSC_VER
 /* DUMP MEMORY LEAKS */
 #include <crtdbg.h>
 #endif
@@ -378,7 +378,7 @@ main(int argc, char *argv[])
 
   free ( affine ) ;
 
-#ifdef WIN32
+#ifdef _MSC_VER
   /* DUMP MEMORY LEAK INFORMATION */
   _CrtDumpMemoryLeaks () ;
 #endif
diff --git a/freeglut/freeglut/progs/demos/Lorenz/lorenz.c b/freeglut/freeglut/progs/demos/Lorenz/lorenz.c
index 98361bc..366c7e4 100644
--- a/freeglut/freeglut/progs/demos/Lorenz/lorenz.c
+++ b/freeglut/freeglut/progs/demos/Lorenz/lorenz.c
@@ -33,7 +33,7 @@
 #include <string.h>
 #include <math.h>
 #include <GL/freeglut.h>
-#ifdef WIN32
+#ifdef _MSC_VER
 /* DUMP MEMORY LEAKS */
 #include <crtdbg.h>
 #endif
@@ -365,7 +365,7 @@ int main ( int argc, char *argv[] )
   /* Enter the GLUT main loop */
   glutMainLoop () ;
 
-#ifdef WIN32
+#ifdef _MSC_VER
   /* DUMP MEMORY LEAK INFORMATION */
   _CrtDumpMemoryLeaks () ;
 #endif
diff --git a/freeglut/freeglut/progs/demos/shapes/shapes.c b/freeglut/freeglut/progs/demos/shapes/shapes.c
index 8836ccc..66eb8d4 100644
--- a/freeglut/freeglut/progs/demos/shapes/shapes.c
+++ b/freeglut/freeglut/progs/demos/shapes/shapes.c
@@ -41,7 +41,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#ifdef WIN32
+#ifdef _MSC_VER
 /* DUMP MEMORY LEAKS */
 #include <crtdbg.h>
 #endif
@@ -395,7 +395,7 @@ main(int argc, char *argv[])
 
     glutMainLoop();
 
-#ifdef WIN32
+#ifdef _MSC_VER
     /* DUMP MEMORY LEAK INFORMATION */
     _CrtDumpMemoryLeaks () ;
 #endif