diff --git a/modules/coins.py b/modules/coins.py
index 765ebdc8..550b11e9 100644
--- a/modules/coins.py
+++ b/modules/coins.py
@@ -5,6 +5,8 @@ SIDES = {"heads": 0, "tails": 1}
 DEFAULT_REDEEM_DELAY = 600 # 600 seconds, 10 minutes
 DEFAULT_REDEEM_AMOUNT = 100
 DEFAULT_INTEREST_RATE = 0.01
+INTEREST_INTERVAL = 60*60 # 1 hour
+
 
 class Module(object):
     def __init__(self, bot):
@@ -27,7 +29,7 @@ class Module(object):
         until_next_hour += ((60-(now.minute+1))*60)
 
         bot.events.on("timer").on("coin-interest").hook(self.interest)
-        bot.add_timer("coin-interest", 10, persist=False,
+        bot.add_timer("coin-interest", INTEREST_INTERVAL, persist=False,
             next_due=time.time()+until_next_hour)
 
     def coins(self, event):