diff --git a/libtransport/UserManager.cpp b/libtransport/UserManager.cpp
index c9628676552b07f811254557c2609292173e4583..978e22c745db8163ca46d43ea2154cef7e2f1fbc 100644
--- a/libtransport/UserManager.cpp
+++ b/libtransport/UserManager.cpp
@@ -125,10 +125,12 @@ void UserManager::removeUser(User *user, bool onUserBehalf) {
 #ifndef WIN32
 #ifndef __FreeBSD__
 #ifndef __MACH__
+#if defined (__GLIBC__)
 	malloc_trim(0);
 #endif
 #endif
 #endif
+#endif
 // 	VALGRIND_DO_LEAK_CHECK;
 }