diff --git a/contrib/apt-conf/50appstream b/contrib/apt-conf/50appstream
index 14d1e3a0..6de90d37 100644
--- a/contrib/apt-conf/50appstream
+++ b/contrib/apt-conf/50appstream
@@ -46,6 +46,17 @@ Acquire::IndexTargets {
         KeepCompressedAs "gz";
         DefaultEnabled "false";
     };
+
+    # Even larger icons that are used on HiDPI displays.
+    deb::DEP-11-icons-large-hidpi {
+        MetaKey "$(COMPONENT)/dep11/icons-128x128@2.tar";
+        ShortDescription "icons-128x128@2";
+        Description "$(RELEASE)/$(COMPONENT) DEP-11 128x128@2 Icons";
+
+        KeepCompressed "true";
+        KeepCompressedAs "gz";
+        DefaultEnabled "false";
+    };
 };
 
 # Refresh AppStream cache when APT's cache is updated (i.e. apt update)
diff --git a/contrib/vapi/AppStream-1.0.metadata b/contrib/vapi/AppStream-1.0.metadata
index f02e395f..77894dd3 100644
--- a/contrib/vapi/AppStream-1.0.metadata
+++ b/contrib/vapi/AppStream-1.0.metadata
@@ -1,4 +1,3 @@
 // Metadata for AppStream GIR
 
 AppStream name="AppStream"
-AppStream cheader_filename="appstream.h"
diff --git a/src/as-distro-extras.c b/src/as-distro-extras.c
index d7698c4a..2122d45c 100644
--- a/src/as-distro-extras.c
+++ b/src/as-distro-extras.c
@@ -47,7 +47,7 @@ static const gchar *apt_lists_dir = "/var/lib/apt/lists/";
 static const gchar *appstream_yml_target = "/var/lib/app-info/yaml";
 static const gchar *appstream_icons_target = "/var/lib/app-info/icons";
 
-static const gchar* const default_icon_sizes[] = { "64x64", "64x64@2", "128x128", NULL };
+static const gchar* const default_icon_sizes[] = { "64x64", "64x64@2", "128x128", "128x128@2", NULL };
 
 
 /**
diff --git a/src/meson.build b/src/meson.build
index b43a01c7..ca5eb22f 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -130,6 +130,7 @@ if get_option ('gir')
             'GObject-2.0',
             'Gio-2.0'
         ],
+        extra_args: ['--c-include=appstream.h'],
         install: true
     )