diff --git a/samples/opengl/opengl_interop.cpp b/samples/opengl/opengl_interop.cpp
index d8448ca281..433da782da 100644
--- a/samples/opengl/opengl_interop.cpp
+++ b/samples/opengl/opengl_interop.cpp
@@ -329,7 +329,7 @@ public:
             glXSwapBuffers(m_display, m_window);
 #endif
 
-            print_info(mode, m_timer.time(Timer::UNITS::MSEC), m_oclDevName);
+            print_info(mode, m_timer.time(Timer::MSEC), m_oclDevName);
         }
 
 
diff --git a/samples/opengl/winapp.hpp b/samples/opengl/winapp.hpp
index cf36774955..213310414d 100644
--- a/samples/opengl/winapp.hpp
+++ b/samples/opengl/winapp.hpp
@@ -56,7 +56,7 @@ public:
         m_diff = cv::getTickCount() - m_t0;
     }
 
-    float time(UNITS u = UNITS::MSEC)
+    float time(UNITS u = MSEC)
     {
         float sec = m_diff / m_tick_frequency;