--- a/configure.ac
+++ b/configure.ac
@@ -1387,16 +1387,6 @@
 	wireshark_SUBDIRS="codecs ui/gtk"
 	# Don't use GLIB_CFLAGS
 	AM_PATH_GLIB_2_0($GLIB_MIN_VERSION, , AC_MSG_ERROR(GLib $GLIB_MIN_VERSION or later distribution not found.), gthread gmodule)
-
-	CPPFLAGS="-DGDK_PIXBUF_DISABLE_DEPRECATED $CPPFLAGS"
-	CPPFLAGS="-DGDK_DISABLE_DEPRECATED $CPPFLAGS"
-	CPPFLAGS="-DGTK_DISABLE_DEPRECATED $CPPFLAGS"
-	CPPFLAGS="-DGTK_DISABLE_SINGLE_INCLUDES $CPPFLAGS"
-	if test ! \( $gtk_config_major_version -eq 2 -a $gtk_config_minor_version -lt 20 \) ; then
-		# Enable GSEAL when building with GTK > 2.20
-		# (Versions prior to 2.22 lacked some necessary accessors.)
-		CPPFLAGS="-DGSEAL_ENABLE $CPPFLAGS"
-	fi
 fi
 
 #