diff --git a/backends/apple/coreml/runtime/delegate/multiarray.mm b/backends/apple/coreml/runtime/delegate/multiarray.mm
index d38ac377799..9443f4df73a 100644
--- a/backends/apple/coreml/runtime/delegate/multiarray.mm
+++ b/backends/apple/coreml/runtime/delegate/multiarray.mm
@@ -123,6 +123,9 @@ bool init_bnns_descriptor(BNNSNDArrayDescriptor& bnns_descriptor, const MultiArr
 }
 
 bool copy_using_bnns(const MultiArray& src, MultiArray& dst) {
+    if (src.layout().dataType() != dst.layout().dataType()) {
+        return false;
+    }
     if (dst.layout().num_bytes() < src.layout().num_bytes()) {
         return false;
     }