diff --git a/changes/bug24262 b/changes/bug24262
new file mode 100644
index 000000000..eee69512e
--- /dev/null
+++ b/changes/bug24262
@@ -0,0 +1,3 @@
+  o Minor bugfixes (hidden service):
+    - Fix the consensus parameter "hsdir-interval" to "hsdir_interval" so it
+      matches the dir-spec.txt. Fixes bug 24262; bugfix on 0.3.1.1-alpha.
diff --git a/src/or/hs_common.c b/src/or/hs_common.c
index 42508126f..7cef5a8e2 100644
--- a/src/or/hs_common.c
+++ b/src/or/hs_common.c
@@ -56,7 +56,7 @@ hs_check_service_private_dir(const char *username, const char *path,
 STATIC uint64_t
 get_time_period_length(void)
 {
-  int32_t time_period_length = networkstatus_get_param(NULL, "hsdir-interval",
+  int32_t time_period_length = networkstatus_get_param(NULL, "hsdir_interval",
                                              HS_TIME_PERIOD_LENGTH_DEFAULT,
                                              HS_TIME_PERIOD_LENGTH_MIN,
                                              HS_TIME_PERIOD_LENGTH_MAX);