diff --git a/examples/align/rs-align.cpp b/examples/align/rs-align.cpp
index f35b9b45088..886d7a7770d 100644
--- a/examples/align/rs-align.cpp
+++ b/examples/align/rs-align.cpp
@@ -9,6 +9,10 @@
 #include <imgui_impl_opengl3.h>
 #include<realsense_imgui.h>
 
+#include "imgui_impl_glfw.h"
+#include <imgui_impl_opengl3.h>
+#include<realsense_imgui.h>
+
 /*
  This example introduces the concept of spatial stream alignment.
  For example usecase of alignment, please check out align-advanced and measure demos.