diff --git a/src/dmg/GB.cpp b/src/dmg/GB.cpp
index 89452e8e..7f86e579 100644
--- a/src/dmg/GB.cpp
+++ b/src/dmg/GB.cpp
@@ -4935,7 +4935,7 @@ void gbEmulate(int ticksToStop)
 
                 if(newmask)
                 {
-                  gbMemory[0xff0f] |= 16;
+                  gbMemory[0xff0f] = register_IF |= 16;
                 }