diff --git a/fpga/pcie_driver/jfjoch_function.c b/fpga/pcie_driver/jfjoch_function.c
index 6907bd80..a6a44872 100644
--- a/fpga/pcie_driver/jfjoch_function.c
+++ b/fpga/pcie_driver/jfjoch_function.c
@@ -348,4 +348,5 @@ int jfjoch_run_frame_gen(struct jfjoch_drvdata *drvdata, struct FrameGeneratorCo
     iowrite32(config->exptime,                    drvdata->bar0 + ADDR_FRAME_GEN_EXPTIME);
     iowrite32(config->debug,                      drvdata->bar0 + ADDR_FRAME_GEN_DEBUG);
     iowrite32(0x1,                                drvdata->bar0 + ADDR_FRAME_GEN_CTRL);
+    return 0;
 }
\ No newline at end of file