diff --git a/sim/testsuite/sky/sce_main.c b/sim/testsuite/sky/sce_main.c
index 2fb0ebca1e..d6a74754c8 100644
--- a/sim/testsuite/sky/sce_main.c
+++ b/sim/testsuite/sky/sce_main.c
@@ -134,4 +134,6 @@ int main() {
     wait_until_idle();
     start_DMA_ch1_source_chain(&gpu_refresh);
     wait_a_while();
+
+    return 0;
 }