diff --git a/src/memory_manager.cpp b/src/memory_manager.cpp
index 70e017d7f..51c973a63 100644
--- a/src/memory_manager.cpp
+++ b/src/memory_manager.cpp
@@ -67,7 +67,7 @@ namespace Sass {
     // remove from pool
     remove(np);
     // release memory
-    free(np);
+    delete np;
   }
 
   // compile implementation for AST_Node