1 file changed, 2 insertions, 3 deletions
diff --git a/source/ui-stats.h b/source/ui-stats.h
index 325e082..1cd0b9d 100644
--- a/source/ui-stats.h
+++ b/source/ui-stats.h
@@ -20,9 +20,8 @@ struct cgit_period {
 	// Move a tm back to the first day of the period it falls in.
 	void (*trunc)(struct tm *tm);
 
-	// Step a truncated tm one whole period back or forward.
-	void (*dec)(struct tm *tm);
-	void (*inc)(struct tm *tm);
+	// Step a truncated tm n whole periods, back when n is negative.
+	void (*step)(struct tm *tm, int n);
 
 	// Label the period a tm falls in. The buffer is reused, so a caller
 	// that keeps a label copies it.