diff --git a/python/pyspark/mllib/linalg/__init__.py b/python/pyspark/mllib/linalg/__init__.py
index 70509a6d9bece..3a345b2b5638c 100644
--- a/python/pyspark/mllib/linalg/__init__.py
+++ b/python/pyspark/mllib/linalg/__init__.py
@@ -569,7 +569,7 @@ def parse(s):
         if start == -1:
             raise ValueError("Tuple should start with '('")
         end = s.find(')')
-        if start == -1:
+        if end == -1:
             raise ValueError("Tuple should end with ')'")
         s = s[start + 1: end].strip()