diff --git a/ui-log.c b/ui-log.c
index 1b60591..32b4c47 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -12,7 +12,7 @@
 #include "ui-shared.h"
 #include "argv-array.h"
 
-int files, add_lines, rem_lines;
+static int files, add_lines, rem_lines;
 
 /*
  * The list of available column colors in the commit graph.