diff --git a/tools/perf/Documentation/perf.data-file-format.txt b/tools/perf/Documentation/perf.data-file-format.txt
index 5f54feb199777e7855b6fa571447d453d421b0cf..d030c87ed9f57d0589faa99615b59f49761da895 100644
--- a/tools/perf/Documentation/perf.data-file-format.txt
+++ b/tools/perf/Documentation/perf.data-file-format.txt
@@ -126,7 +126,7 @@ vendor,family,model,stepping. For example: GenuineIntel,6,69,1
 
 	HEADER_TOTAL_MEM = 10,
 
-An uint64_t with the total memory in bytes.
+An uint64_t with the total memory in kilobytes.
 
 	HEADER_CMDLINE = 11,