diff --git a/lib/irrlicht/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.h b/lib/irrlicht/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.h
index 174c68f11..f1412e03e 100644
--- a/lib/irrlicht/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.h
+++ b/lib/irrlicht/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.h
@@ -19,9 +19,11 @@
 #include <OpenGL/OpenGL.h>
 #include <map>
 
+#ifndef __OBJC__
 class NSWindow;
 class NSOpenGLContext;
 class NSBitmapImageRep;
+#endif
 
 namespace irr
 {
diff --git a/src/utils/random_generator.hpp b/src/utils/random_generator.hpp
index e5f3c0123..dfa53b46e 100644
--- a/src/utils/random_generator.hpp
+++ b/src/utils/random_generator.hpp
@@ -21,6 +21,7 @@
 
 #include <algorithm>
 #include <vector>
+#include <stdlib.h>
 
 /** A random number generator. Each objects that needs a random number uses
     its own number random generator. They are all seeded with number provided