diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5687d50..fac7884 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -398,6 +398,12 @@ set(IMGUI_SOURCES
     ${IMGUI_DIR}/backends/imgui_impl_sdl3.cpp
 )
 
+# The ImGui demo window is unreachable in the wallet, so compile imgui_demo.cpp to its empty stubs
+# (ShowDemoWindow/ShowStyleEditor/... stay defined; imgui.h declares them unconditionally, so this is ODR-safe).
+# Do NOT use IMGUI_DISABLE_DEBUG_TOOLS: it changes imgui.h declarations and removes duplicate-ID highlighting.
+# (Makefiles: a per-source define lands in the target's flags.make, so existing trees do one full app rebuild.)
+set_source_files_properties(${IMGUI_DIR}/imgui_demo.cpp PROPERTIES COMPILE_DEFINITIONS IMGUI_DISABLE_DEMO_WINDOWS)
+
 set(IMGUI_HEADERS
     ${IMGUI_DIR}/imgui.h
     ${IMGUI_DIR}/imconfig.h