diff --git a/src/syndicate.nim b/src/syndicate.nim
index 28cd622..d19f858 100644
--- a/src/syndicate.nim
+++ b/src/syndicate.nim
@@ -223,6 +223,7 @@ macro during*(turn: var Turn; ds: Ref; pattern: Pattern; publishBody: untyped) =
     callbackProc = wrapDuringHandler(publishBody, nil)
     callbackSym = callbackProc[0]
   result = quote do:
-    doAssert `pattern`.analyse.capturePaths.len == `argCount`, "mismatch between pattern capture and handler arguments"
+    doAssert `pattern`.analyse.capturePaths.len == `argCount`,
+      ("capture path has " & $`pattern`.analyse.capturePaths.len & " args for " & $`pattern`)
     `callbackProc`
     discard observe(`turn`, `ds`, `pattern`, during(`callbackSym`))
diff --git a/src/syndicate/membranes.nim b/src/syndicate/membranes.nim
index a1ba502..23d8439 100644
--- a/src/syndicate/membranes.nim
+++ b/src/syndicate/membranes.nim
@@ -1,7 +1,7 @@
 # SPDX-FileCopyrightText: ☭ 2022 Emery Hemingway
 # SPDX-License-Identifier: Unlicense
 
-import std/[hashes, options, tables]
+import std/[hashes, tables]
 
 from ./actors import Ref, hash
 from ./protocols/sturdy import Oid