diff --git a/main.cpp b/main.cpp
index ca0fca8b36455..0c17b30354489 100644
--- a/main.cpp
+++ b/main.cpp
@@ -549,9 +549,7 @@ bool llama_eval(
 
     const int d_key = n_embd/n_head;
 
-     // TODO: check if this size scales with n_ctx linearly and remove constant. somehow I feel it wasn't the case
-    // static size_t buf_size = hparams.n_ctx*1024*1024;
-    static size_t buf_size = 512u*1024*1024;
+    static size_t buf_size = (size_t)hparams.n_ctx*1024*1024;
     static void * buf = malloc(buf_size);
 
     if (mem_per_token > 0 && mem_per_token*N > buf_size) {