diff --git a/src/usermanager.cpp b/src/usermanager.cpp
index 543286dbbb1774be652ff33471f8448d49a22d7b..e8a037125d0c48c5ea43beed2fc2265e46706d99 100644
--- a/src/usermanager.cpp
+++ b/src/usermanager.cpp
@@ -99,7 +99,9 @@ void UserManager::removeUser(User *user) {
 
 	onUserDestroyed(user);
 	delete user;
+#ifndef WIN32
 	malloc_trim(0);
+#endif
 // 	VALGRIND_DO_LEAK_CHECK;
 }