2 files changed, 3 insertions, 4 deletions
diff --git a/src/support/threads.cpp b/src/support/threads.cpp
index ab9de4175..bd026b69c 100644
--- a/src/support/threads.cpp
+++ b/src/support/threads.cpp
@@ -216,8 +216,7 @@ void ThreadPool::notifyThreadIsReady() {
 
 void ThreadPool::resetThreadsAreReady() {
   DEBUG_POOL("reset threads are ready\n";)
-  auto old = ready.exchange(0);
-  WASM_UNUSED(old);
+  [[maybe_unused]] auto old = ready.exchange(0);
   assert(old == threads.size());
 }
 
diff --git a/src/support/threads.h b/src/support/threads.h
index 8a04f78bd..ca13abf4e 100644
--- a/src/support/threads.h
+++ b/src/support/threads.h
@@ -22,6 +22,7 @@
 #define wasm_support_threads_h
 
 #include <atomic>
+#include <cassert>
 #include <condition_variable>
 #include <functional>
 #include <memory>
@@ -125,8 +126,7 @@ public:
   OnlyOnce() { created.store(0); }
 
   void verify() {
-    auto before = created.fetch_add(1);
-    WASM_UNUSED(before);
+    [[maybe_unused]] auto before = created.fetch_add(1);
     assert(before == 0);
   }
 };