diff --git a/code/nel/include/nel/misc/co_task.h b/code/nel/include/nel/misc/co_task.h
index bfd8f9ef0..80542834e 100644
--- a/code/nel/include/nel/misc/co_task.h
+++ b/code/nel/include/nel/misc/co_task.h
@@ -201,7 +201,9 @@ namespace NLMISC
 		 */
 		void sleep(uint milliseconds);
 
-
+		/** Release internal instance.
+		 */
+		static void releaseInstance();
 	};
 
 
diff --git a/code/nel/src/misc/co_task.cpp b/code/nel/src/misc/co_task.cpp
index 97a9e1e23..f817e3a5f 100644
--- a/code/nel/src/misc/co_task.cpp
+++ b/code/nel/src/misc/co_task.cpp
@@ -213,6 +213,16 @@ namespace NLMISC
 			return _ThreadMainFiber.getPointer();
 		}
 #endif
+
+		static void releaseInstance()
+		{
+			if (_Instance)
+			{
+				NLMISC::INelContext::getInstance().releaseSingletonPointer("CCurrentCoTask", _Instance);
+				delete _Instance;
+				_Instance = NULL;
+			}
+		}
 	};
 
 	NLMISC_SAFE_SINGLETON_IMPL(CCurrentCoTask);
@@ -560,5 +570,10 @@ namespace NLMISC
 		}
 	}
 
+	void CCoTask::releaseInstance()
+	{
+		CCurrentCoTask::releaseInstance();
+	}
+
 } // namespace NLMISC
 
diff --git a/code/ryzom/client/src/release.cpp b/code/ryzom/client/src/release.cpp
index 742a82edb..aac29d590 100644
--- a/code/ryzom/client/src/release.cpp
+++ b/code/ryzom/client/src/release.cpp
@@ -669,6 +669,7 @@ void release()
 	CWidgetManager::release();
 	CViewRenderer::release();
 	CIXml::releaseLibXml();
+	CCoTask::releaseInstance();
 
 #if FINAL_VERSION
 	// openURL ("http://www.ryzomcore.org/exit/");