diff --git a/FEXCore/include/FEXCore/Debug/InternalThreadState.h b/FEXCore/include/FEXCore/Debug/InternalThreadState.h
index e5e53f44c..de4c12b1b 100644
--- a/FEXCore/include/FEXCore/Debug/InternalThreadState.h
+++ b/FEXCore/include/FEXCore/Debug/InternalThreadState.h
@@ -71,7 +71,7 @@ struct NonMovableUniquePtr {
     return Ptr;
   }
 
-  operator bool() const noexcept {
+  explicit operator bool() const noexcept {
     return Ptr != nullptr;
   }