diff --git a/src/reflect/value.go b/src/reflect/value.go
index 6830057d61..917a5a69c9 100644
--- a/src/reflect/value.go
+++ b/src/reflect/value.go
@@ -2742,6 +2742,8 @@ func (v Value) UnsafePointer() unsafe.Pointer {
 // Moreover, the Data field is not sufficient to guarantee the data
 // it references will not be garbage collected, so programs must keep
 // a separate, correctly typed pointer to the underlying data.
+//
+// Deprecated: Use unsafe.String or unsafe.StringData instead.
 type StringHeader struct {
 	Data uintptr
 	Len  int
@@ -2753,6 +2755,8 @@ type StringHeader struct {
 // Moreover, the Data field is not sufficient to guarantee the data
 // it references will not be garbage collected, so programs must keep
 // a separate, correctly typed pointer to the underlying data.
+//
+// Deprecated: Use unsafe.Slice or unsafe.SliceData instead.
 type SliceHeader struct {
 	Data uintptr
 	Len  int