diff --git a/src/lib/util/readwrite_mutex.h b/src/lib/util/readwrite_mutex.h
index a76c86fb69..f8766d5af4 100644
--- a/src/lib/util/readwrite_mutex.h
+++ b/src/lib/util/readwrite_mutex.h
@@ -57,7 +57,7 @@ public:
         gate1_.wait(lk, [=]() { return (!writeEntered()); });
         state_ |= WRITE_ENTERED;
         // Wait until there are no more readers.
-        gate2_.wait(lk, [=]() { return (readers() == 0);});
+        gate2_.wait(lk, [=]() { return (readers() == 0); });
     }
 
     /// @brief Unlock write.