diff --git a/repos/base/include/util/string.h b/repos/base/include/util/string.h
index b5d69ba411..6242347d19 100644
--- a/repos/base/include/util/string.h
+++ b/repos/base/include/util/string.h
@@ -51,6 +51,18 @@ class Genode::Number_of_bytes
 		 * Convert number of bytes to 'size_t' value
 		 */
 		operator size_t() const { return _n; }
+
+		void print(Output &output) const
+		{
+			using Genode::print;
+
+			enum { KB = 1024UL, MB = KB*1024UL, GB = MB*1024UL };
+
+			if      (_n % GB == 0) print(output, _n/GB, "G");
+			else if (_n % MB == 0) print(output, _n/MB, "M");
+			else if (_n % KB == 0) print(output, _n/KB, "K");
+			else                   print(output, _n);
+		}
 };