--- configure.ac
+++ configure.ac
@@ -242,8 +242,6 @@
 fi
 if test x$HAVE_GTKGLEXT = x0
 then
-    HAVE_GLEW=0
-    GLEW_LIBS=""
     GTKGLEXT_LIBS=""
 fi
 AC_DEFINE_UNQUOTED(HAVE_GTKGLEXT, $HAVE_GTKGLEXT, [non-zero when all the requirements for GtkGLExt are met])