diff --git a/toonz/sources/include/tgl.h b/toonz/sources/include/tgl.h
index 1a4f7e7..980008e 100644
--- a/toonz/sources/include/tgl.h
+++ b/toonz/sources/include/tgl.h
@@ -10,6 +10,7 @@
 #include <GL/gl.h>
 #include <GL/glu.h>
 #include <GL/glut.h>
+#include <GL/glext.h>
 #endif
 
 #ifdef MACOSX
diff --git a/toonz/sources/tnzext/meshutils.cpp b/toonz/sources/tnzext/meshutils.cpp
index 52d4e16..3e65b8a 100644
--- a/toonz/sources/tnzext/meshutils.cpp
+++ b/toonz/sources/tnzext/meshutils.cpp
@@ -320,7 +320,6 @@ void tglDraw(const TMeshImage &meshImage,
 			 const PlasticDeformerDataGroup &group)
 {
 #ifdef _WIN32
-	typedef void (*PFNGLBLENDFUNCSEPARATEPROC)(GLenum, GLenum, GLenum, GLenum);
 	static PFNGLBLENDFUNCSEPARATEPROC const glBlendFuncSeparate =
 		reinterpret_cast<PFNGLBLENDFUNCSEPARATEPROC>(::wglGetProcAddress("glBlendFuncSeparate"));
 #endif