diff --git a/capsulflask/payment.py b/capsulflask/payment.py
index d2ce0d6..3977979 100644
--- a/capsulflask/payment.py
+++ b/capsulflask/payment.py
@@ -39,9 +39,9 @@ def validate_dollars(min: float, max: float):
 
     #current_app.logger.info(f"{str(dollars)}  {str(min)}  {str(dollars < min)}")
 
-    if dollars and dollars < min:
+    if dollars is not None and dollars < min:
       errors.append(f"dollars must be {format(min, '.2f')} or more")
-    elif dollars and dollars >= max:
+    elif dollars is not None and dollars >= max:
       errors.append(f"dollars must be less than {format(max, '.2f')}")
 
   current_app.logger.info(f"{len(errors)}  {errors}")