diff --git a/intern/ghost/intern/GHOST_WindowWayland.cc b/intern/ghost/intern/GHOST_WindowWayland.cc
index b7315a9b399..7027e976de0 100644
--- a/intern/ghost/intern/GHOST_WindowWayland.cc
+++ b/intern/ghost/intern/GHOST_WindowWayland.cc
@@ -50,6 +50,18 @@
 /* Logging, use `ghost.wl.*` prefix. */
 #include "CLG_log.h"
 
+/**
+ * NOTE(@ideasman42): Workaround a bug with fractional scaling with LIBDECOR.
+ * When fractional scaling is used the GHOST window uses a buffer-scale of 1
+ * with the actual scale compensated for by a #wp_viewport.
+ *
+ * This causes various glitches between the GHOST window and LIBDECOR.
+ * While this hack doesn't resolve all of them it does fix the problem where a new windows
+ * decorations don't match the window, sometimes causing a delayed decrease in the windows size.
+ * See #109194 for related issues.
+ */
+#define USE_LIBDECOR_FRACTIONAL_SCALE_HACK
+
 static const xdg_activation_token_v1_listener *xdg_activation_listener_get();
 
 static constexpr size_t base_dpi = 96;
@@ -493,6 +505,20 @@ static bool gwl_window_viewport_set(GWL_Window *win,
     else {
       wl_surface_commit(win->wl.surface);
     }
+
+#if defined(WITH_GHOST_WAYLAND_LIBDECOR) && defined(USE_LIBDECOR_FRACTIONAL_SCALE_HACK)
+    /* NOTE(@ideasman42): it's important this only runs when enabling the viewport
+     * since there is a bug with LIBDECOR not supporting the switch from non-fractional
+     * to fractional scaled surfaces. */
+    if (use_libdecor) {
+      WGL_LibDecor_Window &decor = *win->libdecor;
+      libdecor_state *state = libdecor_state_new(
+          gwl_window_fractional_from_viewport_round(win->frame, win->frame.size[0]),
+          gwl_window_fractional_from_viewport_round(win->frame, win->frame.size[1]));
+      libdecor_frame_commit(decor.frame, state, nullptr);
+      libdecor_state_free(state);
+    }
+#endif
   }
 
   return true;
@@ -1367,7 +1393,8 @@ GHOST_WindowWayland::GHOST_WindowWayland(GHOST_SystemWayland *system,
    * is detected and enabled. Unfortunately, it doesn't seem possible to receive the
    * #wp_fractional_scale_v1_listener::preferred_scale information before the window is created
    * So leave the buffer scaled up because there is no *guarantee* the fractional scaling support
-   * will run which could result in an incorrect buffer scale. */
+   * will run which could result in an incorrect buffer scale.
+   * Leaving the buffer scale is necessary for #USE_LIBDECOR_FRACTIONAL_SCALE_HACK to work too. */
   window_->frame.buffer_scale = outputs_uniform_scale_or_default(
       system_->outputs_get(), 1, nullptr);
   window_->frame_pending.buffer_scale = window_->frame.buffer_scale;