diff --git a/changes/bug40869 b/changes/bug40869
new file mode 100644
index 0000000000..da9666333f
--- /dev/null
+++ b/changes/bug40869
@@ -0,0 +1,3 @@
+  o Minor bugfixes (directory authority):
+    - Look at the network parameter "maxunmeasuredbw" with the
+      correct spelling.  Fixes bug 40869; bugfix on 0.4.6.1-alpha.
diff --git a/src/feature/dirauth/dirvote.c b/src/feature/dirauth/dirvote.c
index 2839c6db15..f8290cde6d 100644
--- a/src/feature/dirauth/dirvote.c
+++ b/src/feature/dirauth/dirvote.c
@@ -1781,7 +1781,7 @@ networkstatus_compute_consensus(smartlist_t *votes,
 
   {
     max_unmeasured_bw_kb = dirvote_get_intermediate_param_value(
-                param_list, "maxunmeasurdbw", DEFAULT_MAX_UNMEASURED_BW_KB);
+                param_list, "maxunmeasuredbw", DEFAULT_MAX_UNMEASURED_BW_KB);
     if (max_unmeasured_bw_kb < 1)
       max_unmeasured_bw_kb = 1;
   }
diff --git a/src/test/test_dir.c b/src/test/test_dir.c
index baf67be4f8..87aaef7fe6 100644
--- a/src/test/test_dir.c
+++ b/src/test/test_dir.c
@@ -4107,7 +4107,7 @@ vote_tweaks_for_umbw(networkstatus_t *v, int voter, time_t now)
                          NULL, 0, -1);
   /* If we're using a non-default clip bandwidth, add it to net_params */
   if (alternate_clip_bw > 0) {
-    tor_asprintf(&maxbw_param, "maxunmeasurdbw=%u", alternate_clip_bw);
+    tor_asprintf(&maxbw_param, "maxunmeasuredbw=%u", alternate_clip_bw);
     tt_assert(maxbw_param);
     if (maxbw_param) {
       smartlist_add(v->net_params, maxbw_param);