diff --git a/CMakeLists.txt b/CMakeLists.txt
index e6b8e46..f308c12 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -183,7 +183,6 @@ if(ENABLE_EXTRA_GCC_CHECKS)   # This overrides -Werror
 endif()
 
 add_definitions(
-	-DG_DISABLE_DEPRECATED
 	-DG_DISABLE_SINGLE_INCLUDES
 )
 
diff --git a/configure.ac b/configure.ac
index cf593db..4e2f0d2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1474,14 +1474,6 @@ then
 fi
 AC_SUBST(MOC)
 
-# Error out if a glib header other than a "top level" header
-#  (glib.h, glib-object.h, gio.h) or certain other headers( e.g.,gmodule.h)
-#  is used.
-CPPFLAGS="-DG_DISABLE_SINGLE_INCLUDES $CPPFLAGS"
-
-# Error out on the usage of deprecated glib functions
-CPPFLAGS="-DG_DISABLE_DEPRECATED $CPPFLAGS"
-
 #
 # Check whether GLib modules are supported, to determine whether we
 # can support plugins.