diff --git a/OpenRA.Platforms.Default/Sdl2PlatformWindow.cs b/OpenRA.Platforms.Default/Sdl2PlatformWindow.cs
index 0972379dc0..11259f1ff3 100644
--- a/OpenRA.Platforms.Default/Sdl2PlatformWindow.cs
+++ b/OpenRA.Platforms.Default/Sdl2PlatformWindow.cs
@@ -124,6 +124,15 @@ namespace OpenRA.Platforms.Default
 		[DllImport("user32.dll")]
 		static extern bool SetProcessDPIAware();
 
+		[DllImport("libX11")]
+		static extern IntPtr XInternAtom(IntPtr display, string atom_name, bool only_if_exists);
+
+		[DllImport("libX11", CharSet=CharSet.Ansi)]
+		static extern int XChangeProperty(IntPtr display, IntPtr window, IntPtr property, IntPtr type, int format, IntPtr mode, string data, int elements);
+
+		[DllImport("libX11")]
+		static extern IntPtr XFlush(IntPtr display);
+
 		public Sdl2PlatformWindow(Size requestEffectiveWindowSize, WindowMode windowMode,
 			float scaleModifier, int batchSize, int videoDisplay, GLProfile requestProfile, bool enableLegacyGL)
 		{
@@ -218,10 +227,10 @@ namespace OpenRA.Platforms.Default
 				window = SDL.SDL_CreateWindow("OpenRA", SDL.SDL_WINDOWPOS_CENTERED_DISPLAY(videoDisplay), SDL.SDL_WINDOWPOS_CENTERED_DISPLAY(videoDisplay),
 					windowSize.Width, windowSize.Height, windowFlags);
 
-				// Work around an issue in macOS's GL backend where the window remains permanently black
-				// (if dark mode is enabled) unless we drain the event queue before initializing GL
 				if (Platform.CurrentPlatform == PlatformType.OSX)
 				{
+					// Work around an issue in macOS's GL backend where the window remains permanently black
+					// (if dark mode is enabled) unless we drain the event queue before initializing GL
 					while (SDL.SDL_PollEvent(out var e) != 0)
 					{
 						// We can safely ignore all mouse/keyboard events and window size changes
@@ -241,6 +250,35 @@ namespace OpenRA.Platforms.Default
 						}
 					}
 				}
+				else if (Platform.CurrentPlatform == PlatformType.Linux)
+				{
+					// The KDE task switcher limits itself to the 128px icon unless we
+					// set an X11 _KDE_NET_WM_DESKTOP_FILE property on the window
+					var currentDesktop = Environment.GetEnvironmentVariable("XDG_CURRENT_DESKTOP");
+					var desktopFilename = Environment.GetEnvironmentVariable("OPENRA_DESKTOP_FILENAME");
+					if (desktopFilename != null && currentDesktop == "KDE")
+					{
+						try
+						{
+							var info = default(SDL.SDL_SysWMinfo);
+							SDL.SDL_VERSION(out info.version);
+							SDL.SDL_GetWindowWMInfo(Window, ref info);
+
+							var d = info.info.x11.display;
+							var w = info.info.x11.window;
+							var property = XInternAtom(d, "_KDE_NET_WM_DESKTOP_FILE", false);
+							var type = XInternAtom(d, "UTF8_STRING", false);
+
+							XChangeProperty(d, w, property, type, 8, IntPtr.Zero, desktopFilename, desktopFilename.Length + 1);
+							XFlush(d);
+						}
+						catch
+						{
+							Log.Write("debug", "Failed to set _KDE_NET_WM_DESKTOP_FILE");
+							Console.WriteLine("Failed to set _KDE_NET_WM_DESKTOP_FILE");
+						}
+					}
+				}
 
 				// Enable high resolution rendering for Retina displays
 				if (Platform.CurrentPlatform == PlatformType.OSX)
diff --git a/packaging/linux/openra.appimage.in b/packaging/linux/openra.appimage.in
index 727545f5c2..45cac44b4f 100755
--- a/packaging/linux/openra.appimage.in
+++ b/packaging/linux/openra.appimage.in
@@ -8,19 +8,27 @@ cd "${HERE}/../lib/openra" || exit 1
 if [ -n "${APPIMAGE}" ]; then
 	LAUNCHER=${APPIMAGE}
 
-	# appimaged doesn't update the mime or icon caches when registering AppImages.
-	# Run update-desktop-database and gtk-update-icon-cache ourselves if we detect
-	# that the desktop file has been installed but the handler is not cached
-	if command -v update-desktop-database > /dev/null; then
-		APPIMAGEID=$(printf "file://%s" "${APPIMAGE}" | md5sum | cut -d' ' -f1)
-		LAUNCHER_NAME="appimagekit_${APPIMAGEID}-openra-{MODID}.desktop"
-		LAUNCHER_PATH="${HOME}/.local/share/applications/${LAUNCHER_NAME}"
-		MIMECACHE_PATH="${HOME}/.local/share/applications/mimeinfo.cache"
-		SCHEME="x-scheme-handler/openra-{MODID}-{TAG}"
-		if [ -f "${LAUNCHER_PATH}" ] && ! grep -qs "${SCHEME}=" "${MIMECACHE_PATH}"; then
-			update-desktop-database "${HOME}/.local/share/applications"
-			if command -v gtk-update-icon-cache > /dev/null; then
-				gtk-update-icon-cache ~/.local/share/icons/hicolor/ -t
+	APPIMAGEID=$(printf "file://%s" "${APPIMAGE}" | md5sum | cut -d' ' -f1)
+	LAUNCHER_NAME="appimagekit_${APPIMAGEID}-openra-{MODID}.desktop"
+	LAUNCHER_PATH="${HOME}/.local/share/applications/${LAUNCHER_NAME}"
+	export SDL_VIDEO_X11_WMCLASS="openra-{MODID}-{TAG}"
+
+	if [ -f "${LAUNCHER_PATH}" ]; then
+		# The KDE task switcher limits itself to the 128px icon unless we
+		# set an X11 _KDE_NET_WM_DESKTOP_FILE property on the window
+		export OPENRA_DESKTOP_FILENAME="${LAUNCHER_NAME}"
+
+		# appimaged doesn't update the mime or icon caches when registering AppImages.
+		# Run update-desktop-database and gtk-update-icon-cache ourselves if we detect
+		# that the desktop file has been installed but the handler is not cached
+		if command -v update-desktop-database > /dev/null; then
+			MIMECACHE_PATH="${HOME}/.local/share/applications/mimeinfo.cache"
+			SCHEME="x-scheme-handler/openra-{MODID}-{TAG}"
+			if ! grep -qs "${SCHEME}=" "${MIMECACHE_PATH}"; then
+				update-desktop-database "${HOME}/.local/share/applications"
+				if command -v gtk-update-icon-cache > /dev/null; then
+					gtk-update-icon-cache ~/.local/share/icons/hicolor/ -t
+				fi
 			fi
 		fi
 	fi