diff --git a/src/or/rephist.c b/src/or/rephist.c
index 9742501352..af3cbcc868 100644
--- a/src/or/rephist.c
+++ b/src/or/rephist.c
@@ -598,7 +598,7 @@ rep_hist_get_bandwidth_lines(void)
     tor_assert(b);
     format_iso_time(t, b->next_period-NUM_SECS_BW_SUM_INTERVAL);
     tor_snprintf(cp, len-(cp-buf), "opt %s %s (%d s) ",
-                 r ? "read-history " : "write-history", t,
+                 r ? "read-history" : "write-history", t,
                  NUM_SECS_BW_SUM_INTERVAL);
     cp += strlen(cp);