diff --git a/backends/swiften/main.cpp b/backends/swiften/main.cpp
index 93137352ebd82ebc499a85cb71585e30ab983247..db6ea37ba2d15b7dd0330ed67903df5da0b59f4c 100644
--- a/backends/swiften/main.cpp
+++ b/backends/swiften/main.cpp
@@ -17,9 +17,11 @@
 #endif
 
 #ifndef __FreeBSD__
+#ifndef __MACH__
 // malloc_trim
 #include "malloc.h"
 #endif
+#endif
 
 // Boost
 #include <boost/algorithm/string.hpp>
@@ -189,9 +191,11 @@ class SwiftenPlugin : public NetworkPlugin {
 
 #ifndef WIN32
 #ifndef __FreeBSD__
+#ifndef __MACH__
 			// force returning of memory chunks allocated by libxml2 to kernel
 			malloc_trim(0);
 #endif
+#endif
 #endif
 		}