diff --git a/src/common/darktable.c b/src/common/darktable.c
index 9c80fe6f03a6..f3eee4e014a6 100644
--- a/src/common/darktable.c
+++ b/src/common/darktable.c
@@ -1473,6 +1473,10 @@ int dt_init(int argc,
     g_free(new_xdg_data_dirs);
   }
 
+  // desktop entry name required for mapping application icon to
+  // window for KDE/Plasma on Wayland under GTK 3
+  g_set_prgname("org.darktable.darktable");
+
   setlocale(LC_ALL, "");
   char localedir[PATH_MAX] = { 0 };
   dt_loc_get_localedir(localedir, sizeof(localedir));