diff --git a/drivers/dma/stm32-mdma.c b/drivers/dma/stm32-mdma.c
index e28acbcb53f4..b9d4c843635f 100644
--- a/drivers/dma/stm32-mdma.c
+++ b/drivers/dma/stm32-mdma.c
@@ -1539,6 +1539,7 @@ static struct dma_chan *stm32_mdma_of_xlate(struct of_phandle_args *dma_spec,
 		return NULL;
 	}
 
+	memset(&config, 0, sizeof(config));
 	config.request = dma_spec->args[0];
 	config.priority_level = dma_spec->args[1];
 	config.transfer_config = dma_spec->args[2];