diff --git a/ggml.c b/ggml.c
index a93f1fb7f..515a4d19c 100644
--- a/ggml.c
+++ b/ggml.c
@@ -5822,7 +5822,6 @@ struct ggml_tensor * ggml_cont_impl(
     bool is_node = false;
 
     if (!inplace && a->grad) {
-        // TODO: implement backward
         is_node = true;
     }
 
@@ -13188,7 +13187,15 @@ static void ggml_compute_backward(struct ggml_context * ctx, struct ggml_tensor
             } break;
         case GGML_OP_CONT:
             {
-                GGML_ASSERT(false); // TODO: not implemented
+                // same as cpy
+                if (src0->grad) {
+                    GGML_ASSERT(ggml_is_contiguous(src0->grad));
+                    GGML_ASSERT(ggml_is_contiguous(tensor->grad));
+                    src0->grad = ggml_add_impl(ctx, src0->grad, tensor->grad, inplace);
+                }
+                if (src1->grad) {
+                    // noop
+                }
             } break;
         case GGML_OP_RESHAPE:
             {