diff --git a/config.h.in b/config.h.in
index f0ff231..08e3146 100644
--- a/config.h.in
+++ b/config.h.in
@@ -51,6 +51,9 @@
 /* Define to 1 if you have the <getopt.h> header file. */
 #undef HAVE_GETOPT_H
 
+/* Use GTK3 */
+#undef HAVE_GTK3
+
 /* Define to 1 if you have the `inet_ntoa' function. */
 #undef HAVE_INET_NTOA
 
diff --git a/configure.ac b/configure.ac
index ff8c174..5c7de3a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.69])
-AC_INIT([scopedesign], [0.2.2], [tbowers@email.arizona.edu])
+AC_INIT([scopedesign], [0.2.3], [tbowers@email.arizona.edu])
 AM_INIT_AUTOMAKE
 AC_CONFIG_SRCDIR([src/main.c])
 AC_CONFIG_HEADERS([config.h])
@@ -26,8 +26,9 @@ AC_PROG_LN_S
 AC_PROG_MAKE_SET
 AC_PROG_RANLIB          dnl Needed by ARGTABLE, XPA
 
-PKG_CHECK_MODULES([GTK], [gtk+-3.0])
-
+PKG_CHECK_MODULES([GTK], [gtk+-3.0], 
+			 [AC_DEFINE([HAVE_GTK3], [1], [Use GTK3])],
+			 [AC_DEFINE([HAVE_GTK3], [0], [Use GTK3])] )
 
 
 # Checks for header files.
diff --git a/src/main.c b/src/main.c
index 65a97ea..269ddac 100644
--- a/src/main.c
+++ b/src/main.c
@@ -102,7 +102,9 @@ int main(int argc, char *argv[])
   
   /* Display a splash screen! */
   display_splash(0);
+#if HAVE_GTK3
   ui_example_window();
+#endif
   
   /* Initialize N_RAYS */
   init_set_nrays();
diff --git a/src/ui.c b/src/ui.c
index 2fd0829..2e91df4 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -27,6 +27,8 @@
 #include "sd_defs.h"                   // Main Package Header
 #undef wombat
 
+#if HAVE_GTK3
+
 /* Include packages */
 #include <gtk/gtk.h>
 
@@ -77,3 +79,5 @@ int ui_example_window (){
   
   return status;
 }
+
+#endif