diff --git a/deltachat-ffi/src/lib.rs b/deltachat-ffi/src/lib.rs
index 1bb25400b..d32d5b8c9 100644
--- a/deltachat-ffi/src/lib.rs
+++ b/deltachat-ffi/src/lib.rs
@@ -183,7 +183,7 @@ pub unsafe extern "C" fn dc_get_config(
                     .unwrap_or_default()
                     .strdup(),
                 Err(_) => {
-                    warn!(ctx, "dc_get_config(): invalid key");
+                    warn!(ctx, "dc_get_config(): invalid key '{}'", &key);
                     "".strdup()
                 }
             }
diff --git a/src/imap.rs b/src/imap.rs
index d00847967..e882602b1 100644
--- a/src/imap.rs
+++ b/src/imap.rs
@@ -1228,7 +1228,7 @@ impl Imap {
                         last_uid = Some(server_uid)
                     }
                     Err(err) => {
-                        warn!(context, "dc_receive_imf error: {}", err);
+                        warn!(context, "dc_receive_imf error: {:#}", err);
                     }
                 };
             }