diff --git a/interp/memory.go b/interp/memory.go
index 2812cd01c2..f7d190e3b4 100644
--- a/interp/memory.go
+++ b/interp/memory.go
@@ -222,7 +222,7 @@ func (mv *memoryView) markExternal(llvmValue llvm.Value, mark uint8) error {
 					return err
 				}
 			}
-		case llvm.ArrayTypeKind:
+		case llvm.ArrayTypeKind, llvm.VectorTypeKind:
 			numElements := llvmType.ArrayLength()
 			for i := 0; i < numElements; i++ {
 				element := mv.r.builder.CreateExtractValue(llvmValue, i, "")
@@ -231,6 +231,7 @@ func (mv *memoryView) markExternal(llvmValue llvm.Value, mark uint8) error {
 					return err
 				}
 			}
+		case llvm.MetadataTypeKind:
 		default:
 			return errors.New("interp: unknown type kind in markExternalValue")
 		}