diff --git a/cpp/negentropy_wrapper.c b/cpp/negentropy_wrapper.c
index 5a14c37..363282d 100644
--- a/cpp/negentropy_wrapper.c
+++ b/cpp/negentropy_wrapper.c
@@ -63,7 +63,9 @@ size_t negentropy_initiate(void* negentropy, buffer* out){
         return 0;
     }
     memcpy( out->data, output->c_str() ,output->size());
-    return output->size();
+    size_t outlen = output->size();
+    delete output;
+    return outlen;
 }
 
 void negentropy_setinitiator(void* negentropy){