diff --git a/ggml/src/ggml.c b/ggml/src/ggml.c
index 0bdb71f70..47417c024 100644
--- a/ggml/src/ggml.c
+++ b/ggml/src/ggml.c
@@ -19202,6 +19202,7 @@ int ggml_graph_n_nodes(struct ggml_cgraph * cgraph) {
 }
 
 void ggml_graph_add_node(struct ggml_cgraph * cgraph, struct ggml_tensor * tensor) {
+    GGML_ASSERT(cgraph->size > cgraph->n_nodes);
     cgraph->nodes[cgraph->n_nodes] = tensor;
     cgraph->n_nodes++;
 }