diff --git a/internal/repository/repository.go b/internal/repository/repository.go
index b2f566291..6d2ee19f9 100644
--- a/internal/repository/repository.go
+++ b/internal/repository/repository.go
@@ -436,6 +436,8 @@ func (r *Repository) CurrentRepositorySize(ctx context.Context) (uint64, error)
 
 // MaxCapacityExceeded reports if repository has a limit and if it is exceeded
 func (r *Repository) MaxCapacityExceeded() bool {
+	r.maxRepoMutex.Lock()
+	defer r.maxRepoMutex.Unlock()
 	if r.opts.RepoSizeMax == 0 {
 		return false
 	}