diff --git a/src/gb/gb.c b/src/gb/gb.c
index f739d78b7..ac157f3ad 100644
--- a/src/gb/gb.c
+++ b/src/gb/gb.c
@@ -56,6 +56,7 @@ static void GBInit(void* cpu, struct mCPUComponent* component) {
 
 	gb->timer.p = gb;
 
+	gb->biosVf = 0;
 	gb->romVf = 0;
 	gb->sramVf = 0;