diff --git a/ggml/src/ggml.c b/ggml/src/ggml.c
index 233ea9a665..9f5cdc1398 100644
--- a/ggml/src/ggml.c
+++ b/ggml/src/ggml.c
@@ -3418,6 +3418,7 @@ struct ggml_tensor * ggml_cast(
 
     result->op     = GGML_OP_CPY;
     result->src[0] = a;
+    result->src[1] = result;
 
     return result;
 }