--- lib/ivis_opengl/screen.cpp.old	2014-10-29 13:45:01.516359163 +0100
+++ lib/ivis_opengl/screen.cpp	2014-10-29 13:45:42.743968030 +0100
@@ -261,7 +261,7 @@
 		__glewUseProgram = __glewUseProgramObjectARB;
 		__glewGetShaderiv = __glewGetObjectParameterivARB;
 		__glewLinkProgram = __glewLinkProgramARB;
-		__glewShaderSource = __glewShaderSourceARB;
+		__glewShaderSource = (PFNGLSHADERSOURCEPROC)__glewShaderSourceARB;
 		__glewUniform1f = __glewUniform1fARB;
 		__glewUniform1i = __glewUniform1iARB;
 		__glewUniform4fv = __glewUniform4fvARB;