diff --git a/src/main/vm/CMakeLists.txt b/src/main/vm/CMakeLists.txt
index 6ab6b14165b9efaaed70f836dcd7453437c09b1a..11f88838037cab3650bcf20c718d10fcc4572bbb 100644
--- a/src/main/vm/CMakeLists.txt
+++ b/src/main/vm/CMakeLists.txt
@@ -75,7 +75,16 @@ ADD_LIBRARY(draw SHARED extlib/hidraw.cpp
 TARGET_LINK_LIBRARIES(hivm -ldl)
 TARGET_LINK_LIBRARIES(math hivm)
 
-find_package(OpenGL REQUIRED)
-TARGET_LINK_LIBRARIES(draw hivm ${OPENGL_LIBRARIES} -lglew32)
+# -lglew32 on WINDOWS, -lGLEW -lGLU -lGL on UNIX
+if (APPLE)
+    find_package(OpenGL REQUIRED)
+    TARGET_LINK_LIBRARIES(draw hivm ${OPENGL_LIBRARIES} -lGLEW -lGLU -lGL)
+elseif (UNIX)
+    find_package(OpenGL REQUIRED)
+    TARGET_LINK_LIBRARIES(draw hivm ${OPENGL_LIBRARIES} -lGLEW -lGLU -lGL)
+elseif (WIN32)
+    find_package(OpenGL REQUIRED)
+    TARGET_LINK_LIBRARIES(draw hivm ${OPENGL_LIBRARIES} -lglew32)
+endif ()
 
 TARGET_LINK_LIBRARIES(railgun hivm)
diff --git a/src/main/vm/extlib/hidraw.cpp b/src/main/vm/extlib/hidraw.cpp
index 7f5a493d8408b588911d63d3da7965d970fb853e..34528c22cb02a2203024898cc59c77a662c093ce 100644
--- a/src/main/vm/extlib/hidraw.cpp
+++ b/src/main/vm/extlib/hidraw.cpp
@@ -4,7 +4,7 @@
 #include <GL/glew.h>
 
 #include <math.h>
-
+#include <string.h>
 #ifdef RAILGUN_WINDOWS
 #include <windows.h>
 #endif
@@ -259,4 +259,4 @@ SO_PUBLIC ModuleObject* init_libdraw() {
 
 #ifdef __cplusplus
 }
-#endif
\ No newline at end of file
+#endif