diff --git a/src/gb/core.c b/src/gb/core.c
index ec2ca3c52..c746a204b 100644
--- a/src/gb/core.c
+++ b/src/gb/core.c
@@ -45,6 +45,7 @@ static bool _GBCoreInit(struct mCore* core) {
 	LR35902Init(cpu);
 
 	GBVideoSoftwareRendererCreate(&gbcore->renderer);
+	gbcore->renderer.outputBuffer = NULL;
 
 	gbcore->keys = 0;
 	gb->keySource = &gbcore->keys;