diff --git a/install-poetry.py b/install-poetry.py
index ba67d3df8c8..1508870ae92 100644
--- a/install-poetry.py
+++ b/install-poetry.py
@@ -408,6 +408,8 @@ def run(self) -> int:
             version, current_version = self.get_version()
 
         if version is None:
+            if current_version is None:
+                return 1
             return 0
 
         self.display_pre_message()