diff --git a/lib/waterfoul/interrupt.rb b/lib/waterfoul/interrupt.rb
index cb77be8..6df2e88 100644
--- a/lib/waterfoul/interrupt.rb
+++ b/lib/waterfoul/interrupt.rb
@@ -12,7 +12,7 @@ module Waterfoul
     INTERRUPT_SERIAL  = 0x8
     INTERRUPT_JOYPAD  = 0x10
 
-    def self.request_interupt(interrupt)
+    def self.request_interrupt(interrupt)
       if_reg = $mmu.read_byte IF_REG_MEM_LOC
       $mmu.write_byte IF_REG_MEM_LOC, (if_reg | interrupt)
     end