diff --git a/bauh/gems/arch/confirmation.py b/bauh/gems/arch/confirmation.py
index c314ceca..72a5c835 100644
--- a/bauh/gems/arch/confirmation.py
+++ b/bauh/gems/arch/confirmation.py
@@ -18,7 +18,7 @@ def request_optional_deps(pkgname: str, pkg_repos: dict, watcher: ProcessWatcher
     opts = []
 
     repo_deps = [p for p, data in pkg_repos.items() if data['repository'] != 'aur']
-    sizes = pacman.get_update_size(repo_deps) if repo_deps else None
+    sizes = pacman.get_update_size(repo_deps) if repo_deps else {}
 
     for p, d in pkg_repos.items():
         size = sizes.get(p)
@@ -50,7 +50,7 @@ def request_install_missing_deps(pkgname: str, deps: List[Tuple[str, str]], watc
     opts = []
 
     repo_deps = [d[0] for d in deps if d[1] != 'aur']
-    sizes = pacman.get_update_size(repo_deps) if repo_deps else None
+    sizes = pacman.get_update_size(repo_deps) if repo_deps else {}
 
     for dep in deps:
         size = sizes.get(dep[0])