diff --git a/src/allocator.cpp b/src/allocator.cpp
index b48a54307..d8a68edd3 100644
--- a/src/allocator.cpp
+++ b/src/allocator.cpp
@@ -56,7 +56,7 @@ namespace libtorrent
 #ifdef TORRENT_WINDOWS
 		VirtualFree(block, 0, MEM_RELEASE);
 #else
-		free(block);
+		::free(block);
 #endif
 	}