diff --git a/fairmq/shmem/UnmanagedRegion.h b/fairmq/shmem/UnmanagedRegion.h
index 18edcfa7..6ef408cd 100644
--- a/fairmq/shmem/UnmanagedRegion.h
+++ b/fairmq/shmem/UnmanagedRegion.h
@@ -276,7 +276,7 @@ struct UnmanagedRegion
             throw TransportError(tools::ToString("Unmanaged Region with id ", cfg.id.value(), " has already been registered. Only unique IDs per session are allowed."));
         }
 
-        shmRegions->emplace(cfg.id.value(), RegionInfo(cfg.path.c_str(), cfg.creationFlags, cfg.userFlags, cfg.size, alloc)).second;
+        shmRegions->emplace(cfg.id.value(), RegionInfo(cfg.path.c_str(), cfg.creationFlags, cfg.userFlags, cfg.size, alloc));
         (eventCounter->fCount)++;
     }