diff --git a/src/gba/gba-thread.c b/src/gba/gba-thread.c
index 0151a0219..5aa4acd75 100644
--- a/src/gba/gba-thread.c
+++ b/src/gba/gba-thread.c
@@ -92,6 +92,9 @@ static THREAD_ENTRY _GBAThreadRun(void* context) {
 		}
 		gba.savefile = savedata;
 		GBALoadROM(&gba, threadContext->fd, threadContext->fname);
+		if (threadContext->biosFd >= 0) {
+			GBALoadBIOS(&gba, threadContext->biosFd);
+		}
 	}
 
 #ifdef USE_DEBUGGER
diff --git a/src/gba/gba-thread.h b/src/gba/gba-thread.h
index 16ce72be5..6bb42c8e6 100644
--- a/src/gba/gba-thread.h
+++ b/src/gba/gba-thread.h
@@ -39,6 +39,7 @@ struct GBAThread {
 	// Input
 	struct GBAVideoRenderer* renderer;
 	int fd;
+	int biosFd;
 	const char* fname;
 	int activeKeys;
 	int frameskip;
diff --git a/src/platform/sdl/gl-main.c b/src/platform/sdl/gl-main.c
index f9b6ac8b8..60157057f 100644
--- a/src/platform/sdl/gl-main.c
+++ b/src/platform/sdl/gl-main.c
@@ -70,6 +70,7 @@ int main(int argc, char** argv) {
 
 	struct GBAThread context = {
 		.fd = fd,
+		.biosFd = -1,
 		.fname = fname,
 		.useDebugger = 1,
 		.renderer = &renderer.d.d,