diff --git a/source/Platform/Win32/Win32GLContext.cpp b/source/Platform/Win32/Win32GLContext.cpp
index c9b1c25..5a02f8a 100644
--- a/source/Platform/Win32/Win32GLContext.cpp
+++ b/source/Platform/Win32/Win32GLContext.cpp
@@ -139,7 +139,7 @@ bool Win32GLContext::deactivate()
 
 bool Win32GLContext::isActive() const
 {
-	return ::wglGetCurrentContext() == m_renderContext;
+	return m_renderContext != NULL && ::wglGetCurrentContext() == m_renderContext;
 }
 
 bool Win32GLContext::setSwapInterval(int interval)