diff --git a/packaging/OpenCADStudio.desktop b/packaging/OpenCADStudio.desktop
index 3fe25cbb..404d833c 100644
--- a/packaging/OpenCADStudio.desktop
+++ b/packaging/OpenCADStudio.desktop
@@ -8,4 +8,4 @@ Type=Application
 Categories=Graphics;Engineering;
 MimeType=image/vnd.dwg;image/vnd.dxf;
 Keywords=CAD;DWG;DXF;drawing;design;engineering;2D;3D;
-StartupWMClass=OpenCADStudio
+StartupWMClass=io.github.HakanSeven12.OpenCadStudio
diff --git a/src/app/mod.rs b/src/app/mod.rs
index fa285718..ec37d362 100644
--- a/src/app/mod.rs
+++ b/src/app/mod.rs
@@ -2501,6 +2501,17 @@ impl OpenCADStudio {
             maximized: true,
             icon: window::icon::from_rgba(build_window_icon(), 32, 32).ok(),
             exit_on_close_request: false,
+            // A Wayland compositor has no StartupWMClass to go on: it resolves a
+            // window's dock icon by matching the window's app_id against the
+            // basename of an installed .desktop file. iced defaults the id to an
+            // empty string, so nothing matched and the dock button came up blank
+            // even though the AppImage ships both the .desktop and the icon.
+            // (X11 uses the .desktop's StartupWMClass and was unaffected.)
+            #[cfg(target_os = "linux")]
+            platform_specific: window::settings::PlatformSpecific {
+                application_id: crate::io::file_association::APP_ID.to_string(),
+                ..Default::default()
+            },
             ..Default::default()
         });
         let mut s = state;
diff --git a/src/io/file_association.rs b/src/io/file_association.rs
index f2a1ee21..6b4eeba6 100644
--- a/src/io/file_association.rs
+++ b/src/io/file_association.rs
@@ -22,11 +22,12 @@
 //! would otherwise block the iced executor; the result is delivered back
 //! through a oneshot channel that the async wrapper awaits.
 
-/// Reverse-DNS bundle / app id, shared by the macOS handler binding and the
-/// Linux desktop-file name. Matches `CFBundleIdentifier` in packaging/Info.plist
-/// and the installed `*.desktop` basename.
+/// Reverse-DNS bundle / app id, shared by the macOS handler binding, the
+/// Linux desktop-file name and the Wayland window app_id. Matches
+/// `CFBundleIdentifier` in packaging/Info.plist and the installed `*.desktop`
+/// basename.
 #[cfg(any(target_os = "macos", target_os = "linux"))]
-const APP_ID: &str = "io.github.HakanSeven12.OpenCadStudio";
+pub(crate) const APP_ID: &str = "io.github.HakanSeven12.OpenCadStudio";
 
 /// Silently register this app as *a* handler (not necessarily the default) for
 /// .dwg / .dxf, so it appears in the OS "Open with" list. Unlike