diff --git a/tamper/quote2dollars.py b/tamper/quote2dollars.py
index f102bc033..849adf3a0 100644
--- a/tamper/quote2dollars.py
+++ b/tamper/quote2dollars.py
@@ -22,7 +22,7 @@ def tamper(payload, **kwargs):
     Notes: useful for applications that use PostgreSQL database and encodes or sanitizes quote characters
     
     >>> tamper("1' or '1'='1")
-    "1$$ or $$1$$=$$1"
+    '1$$ or $$1$$=$$1'
     """
 
     return payload.replace("'", "$$")