diff --git a/srcpkgs/telegram-desktop/patches/cstddef.h.patch b/srcpkgs/telegram-desktop/patches/cstddef.h.patch
deleted file mode 100644
index e5a86032279..00000000000
--- a/srcpkgs/telegram-desktop/patches/cstddef.h.patch
+++ /dev/null
@@ -1,30 +0,0 @@
---- a/Telegram/lib_ui/ui/widgets/buttons.h	2025-03-10 07:58:29.000000000 +0100
-+++ -	2025-03-13 21:21:45.309846801 +0100
-@@ -13,6 +13,7 @@
- #include "styles/style_widgets.h"
- 
- #include <memory>
-+#include <cstddef>
- 
- class Painter;
- 
-@@ -273,7 +274,7 @@
- 		const style::SettingsButton &st = st::defaultSettingsButton);
- 	SettingsButton(
- 		QWidget *parent,
--		nullptr_t,
-+		std::nullptr_t,
- 		const style::SettingsButton &st = st::defaultSettingsButton);
- 	~SettingsButton();
- 
---- a/Telegram/lib_ui/ui/widgets/buttons.cpp	2025-03-10 07:58:29.000000000 +0100
-+++ -	2025-03-13 21:27:09.133348285 +0100
-@@ -795,7 +795,7 @@
- 
- SettingsButton::SettingsButton(
- 	QWidget *parent,
--	nullptr_t,
-+	std::nullptr_t,
- 	const style::SettingsButton &st)
- : RippleButton(parent, st.ripple)
- , _st(st)
diff --git a/srcpkgs/telegram-desktop/patches/std_nullptr_t.patch b/srcpkgs/telegram-desktop/patches/std_nullptr_t.patch
new file mode 100644
index 00000000000..14d3fce0baa
--- /dev/null
+++ b/srcpkgs/telegram-desktop/patches/std_nullptr_t.patch
@@ -0,0 +1,35 @@
+This fixes build issues on stricter environments (e.g. with musl libc),
+where `nullptr_t` is not available in the global namespace.
+--- a/Telegram/lib_ui/ui/widgets/buttons.cpp
++++ b/Telegram/lib_ui/ui/widgets/buttons.cpp
+@@ -803,7 +803,7 @@ SettingsButton::SettingsButton(
+ 
+ SettingsButton::SettingsButton(
+ 	QWidget *parent,
+-	nullptr_t,
++	std::nullptr_t,
+ 	const style::SettingsButton &st)
+ : RippleButton(parent, st.ripple)
+ , _st(st)
+--- a/Telegram/lib_ui/ui/widgets/buttons.h
++++ b/Telegram/lib_ui/ui/widgets/buttons.h
+@@ -12,6 +12,7 @@
+ #include "ui/text/text.h"
+ #include "styles/style_widgets.h"
+ 
++#include <cstddef>
+ #include <memory>
+ 
+ class Painter;
+@@ -276,7 +277,7 @@ public:
+ 		const Text::MarkedContext &context = {});
+ 	SettingsButton(
+ 		QWidget *parent,
+-		nullptr_t,
++		std::nullptr_t,
+ 		const style::SettingsButton &st = st::defaultSettingsButton);
+ 	~SettingsButton();
+ 
+-- 
+2.50.1
+
diff --git a/srcpkgs/telegram-desktop/template b/srcpkgs/telegram-desktop/template
index e874e7f43ad..01f9bc5454e 100644
--- a/srcpkgs/telegram-desktop/template
+++ b/srcpkgs/telegram-desktop/template
@@ -1,6 +1,6 @@
 # Template file for 'telegram-desktop'
 pkgname=telegram-desktop
-version=5.12.3
+version=5.16.6
 revision=1
 build_style=cmake
 build_helper="qemu gir"
@@ -8,15 +8,16 @@ configure_args="-DTDESKTOP_API_ID=209235
  -DTDESKTOP_API_HASH=169ee702e1df4b6e66d80311db36cc43
  -DDESKTOP_APP_DISABLE_CRASH_REPORTS=ON
  -DDESKTOP_APP_DISABLE_SPELLCHECK=$(vopt_if spellcheck 'false' 'true')
+ -Dtde2e_DIR='/usr/lib/cmake/Td'
  -DWaylandScanner_EXECUTABLE=/usr/bin/wayland-scanner
  -DQT_HOST_PATH=/usr"
-hostmakedepends="pkg-config qt6-base python3 extra-cmake-modules
- qt6-wayland-tools wayland-devel protobuf glib-devel kf6-kcoreaddons"
+hostmakedepends="pkg-config qt6-base python3 extra-cmake-modules qt6-wayland-tools
+ qt6-declarative-host-tools wayland-devel protobuf glib-devel kf6-kcoreaddons"
 makedepends="alsa-lib-devel boost-devel fmt-devel ffmpeg6-devel libglib-devel
  gobject-introspection libdbusmenu-glib-devel libopenal-devel
  minizip-devel opus-devel xxHash-devel pulseaudio-devel range-v3
  qt6-svg-devel libva-devel rapidjson liblz4-devel liblzma-devel
- MesaLib-devel qt6-wayland-devel qt6-qt5compat-devel
+ MesaLib-devel qt6-wayland-devel qt6-qt5compat-devel libtd-devel
  qt6-base-private-devel kf6-kcoreaddons-devel ada-devel
  xcb-util-keysyms-devel $(vopt_if spellcheck hunspell-devel) protobuf-devel
  glibmm2.68-devel tg_owt rnnoise-devel jemalloc-devel qt6-declarative-devel"
@@ -27,7 +28,7 @@ license="GPL-3.0-or-later, OpenSSL"
 homepage="https://desktop.telegram.org/"
 changelog="https://github.com/telegramdesktop/tdesktop/blob/v${version}/changelog.txt"
 distfiles="https://github.com/telegramdesktop/tdesktop/releases/download/v${version}/tdesktop-${version}-full.tar.gz"
-checksum=050a19e74632eff02737f078b02d78e11faa108d0932371f3d64122b225d3034
+checksum=9b0ae00cec85d0c6735390cc453ed07f005da1d7927f2e77976037877bc1b594
 
 build_options="spellcheck"
 build_options_default="spellcheck"