diff --git a/misc/gbdif.cpp b/misc/gbdif.cpp
index 8fef7cb..5781cd8 100644
--- a/misc/gbdif.cpp
+++ b/misc/gbdif.cpp
@@ -46,7 +46,7 @@ int main(int argc, char** argv)
   BoundRegister ie_mapped(cpu.state.IE);
   BoundRegister if_mapped(cpu.state.IF);
   b.map_device(0xFFFF, 0xFFFF, &ie_mapped);
-  b.map_device(0xFF0F, 0xFF0F, &ie_mapped);
+  b.map_device(0xFF0F, 0xFF0F, &if_mapped);
 
   cpu.state.A = 0x1;
   cpu.state.carry = true;