diff --git a/src/usermanager.cpp b/src/usermanager.cpp
index 3146d8cb1ff7c0ac26ecf095de607b19d0ff27a0..199575584dd01d8591ca66b3f6eee39ff9712954 100644
--- a/src/usermanager.cpp
+++ b/src/usermanager.cpp
@@ -31,7 +31,7 @@
 #include "Swiften/Server/ServerStanzaChannel.h"
 #include "Swiften/Elements/StreamError.h"
 #include "malloc.h"
-// #include "valgrind/memcheck.h"
+#include "valgrind/memcheck.h"
 
 using namespace log4cxx;
 
@@ -100,7 +100,7 @@ void UserManager::removeUser(User *user) {
 	onUserDestroyed(user);
 	delete user;
 	malloc_trim(0);
-// 	VALGRIND_DO_LEAK_CHECK;
+	VALGRIND_DO_LEAK_CHECK;
 }
 
 int UserManager::getUserCount() {