diff --git a/looptrader/basetypes/Strategy/spreadsbydeltastrategy.py b/looptrader/basetypes/Strategy/spreadsbydeltastrategy.py
index 65c555f..7900cf6 100644
--- a/looptrader/basetypes/Strategy/spreadsbydeltastrategy.py
+++ b/looptrader/basetypes/Strategy/spreadsbydeltastrategy.py
@@ -390,7 +390,7 @@ def get_next_expiration(
         """Checks an option chain response for the next expiration date."""
         logger.debug("get_next_expiration")
 
-        if expirations is None or expirations == []:
+        if expirations is None or not expirations:
             logger.error("No expirations provided.")
             return None