diff --git a/include/openGL-headers.h b/include/openGL-headers.h
index 8464b70c5075d4b8dddae4d0b06c24c6c11fe23f..53d9180da0c8a415928eaf2000d2acba39cbb980 100755
--- a/include/openGL-headers.h
+++ b/include/openGL-headers.h
@@ -1,5 +1,5 @@
-#if defined(WIN32) || defined(linux)
-  #include <GL/gl.h> 
+#if defined(WIN32) || defined(__linux__)
+  #include <GL/gl.h>
   #include <GL/glu.h> 
   #include <GL/glut.h>
 #elif defined(__APPLE__)
diff --git a/src/libglslPhong/glslPhong.cpp b/src/libglslPhong/glslPhong.cpp
index da1af495edc14fa95397208e02a3429b3a7e34cc..dee1b725598dc160c2d21aa72b8cbdfb1dbbfd2c 100644
--- a/src/libglslPhong/glslPhong.cpp
+++ b/src/libglslPhong/glslPhong.cpp
@@ -35,7 +35,7 @@
 #include <stdio.h>
 #include <string.h>
 
-#if defined(WIN32) || defined(linux)
+#if defined(WIN32) || defined(__linux__)
   #define USE_GLEW
 #elif defined(__APPLE__)
   #include "openGL-headers.h"