diff --git a/src/javascript/mraajs.i b/src/javascript/mraajs.i
index 1a0c747..7399540 100644
--- a/src/javascript/mraajs.i
+++ b/src/javascript/mraajs.i
@@ -47,6 +47,7 @@ class Spi;
 %#else
   $result = node::Buffer::New((char*) $1, arg3)->handle_;
 %#endif
+  free($1);
 }
 }