diff -Naur mythtv-0.20.2-old/libs/libmythtv/vsync.cpp mythtv-0.20.2-new/libs/libmythtv/vsync.cpp
--- mythtv-0.20.2-old/libs/libmythtv/vsync.cpp	2007-10-13 15:17:24.000000000 -0700
+++ mythtv-0.20.2-new/libs/libmythtv/vsync.cpp	2007-10-13 15:18:33.000000000 -0700
@@ -471,9 +471,9 @@
         __GLXextFuncPtr ret = NULL;
 
 #if GLX_VERSION_1_4
-        X11S(ret = glXGetProcAddress(procName));
+        X11S(ret = ::glXGetProcAddress((const GLubyte *) procName));
 #elif GLX_ARB_get_proc_address
-        X11S(ret = glXGetProcAddressARB(procName));
+        X11S(ret = glXGetProcAddressARB((const GLubyte *) procName));
 #elif GLX_EXT_get_proc_address
         X11S(ret = glXGetProcAddressEXT(procName));
 #endif