diff --git a/repos/base/include/util/string.h b/repos/base/include/util/string.h
index 5eb4eb2162..8228e4ab25 100644
--- a/repos/base/include/util/string.h
+++ b/repos/base/include/util/string.h
@@ -18,12 +18,14 @@
 #include <base/stdint.h>
 #include <base/output.h>
 #include <util/misc_math.h>
+#include <util/noncopyable.h>
 #include <cpu/string.h>
 
 namespace Genode {
 
 	class Number_of_bytes;
 	class Byte_range_ptr;
+	class Const_byte_range_ptr;
 	class Cstring;
 	template <Genode::size_t> class String;
 }
@@ -69,21 +71,37 @@ class Genode::Number_of_bytes
 
 
 /**
- * Data structure for describing a byte buffer
+ * Data structure for describing a mutable byte buffer
  *
  * The type is intended to be used as 'Byte_range_ptr const &' argument.
- * It is deliberately non-copyable.
  */
-struct Genode::Byte_range_ptr
+struct Genode::Byte_range_ptr : Noncopyable
 {
-	char * const start;
-	size_t const num_bytes;
+	struct {
+		char * const start;
+		size_t const num_bytes;
+	};
 
 	Byte_range_ptr(char *start, size_t num_bytes)
 	: start(start), num_bytes(num_bytes) { }
 };
 
 
+/**
+ * Data structure for describing a constant byte buffer
+ */
+struct Genode::Const_byte_range_ptr : Noncopyable
+{
+	struct {
+		char const * const start;
+		size_t       const num_bytes;
+	};
+
+	Const_byte_range_ptr(char const *start, size_t num_bytes)
+	: start(start), num_bytes(num_bytes) { }
+};
+
+
 /***********************
  ** Utility functions **
  ***********************/