diff --git a/100+ Python challenging programming exercises.txt b/100+ Python challenging programming exercises.txt
index 97af5aaf..215b21d6 100644
--- a/100+ Python challenging programming exercises.txt	
+++ b/100+ Python challenging programming exercises.txt	
@@ -33,7 +33,7 @@ for i in range(2000, 3201):
     if (i%7==0) and (i%5!=0):
         l.append(str(i))
 
-print ','.join(l)
+print (','.join(l))
 #----------------------------------------#
 
 #----------------------------------------#