diff --git a/changes/bug22034 b/changes/bug22034
new file mode 100644
index 000000000..6d9e18874
--- /dev/null
+++ b/changes/bug22034
@@ -0,0 +1,4 @@
+  o Minor bugfixes (control port, regression):
+    - The GETINFO extra-info/digest/<digest> command was broken because of a
+      wrong base16 decode return value check. In was introduced in a refactor
+      of that API. Fixex bug #22034; bugfix on tor-0.2.9.1-alpha.
diff --git a/src/or/control.c b/src/or/control.c
index b0a687679..04cd8e8dc 100644
--- a/src/or/control.c
+++ b/src/or/control.c
@@ -2058,7 +2058,7 @@ getinfo_helper_dir(control_connection_t *control_conn,
       char d[DIGEST_LEN];
       signed_descriptor_t *sd = NULL;
       if (base16_decode(d, sizeof(d), question, strlen(question))
-                        != sizeof(d)) {
+                        == sizeof(d)) {
         /* XXXX this test should move into extrainfo_get_by_descriptor_digest,
          * but I don't want to risk affecting other parts of the code,
          * especially since the rules for using our own extrainfo (including