diff --git a/main.c b/main.c
index 81d0f46..58f584a 100644
--- a/main.c
+++ b/main.c
@@ -244,7 +244,7 @@ static int fdt_dump_node_attribute(char * fdt, char * strings, const char *attri
 	snprintf(out_filename, 128, "./%s", outname);
 	*strchr(out_filename, '@') = '_';
 	debug("Open file '%s'\n", out_filename);
-	fd = open(out_filename, O_WRONLY | O_CREAT, 0666);
+	fd = open(out_filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 	if (fd < 0)
 	{
 		printf("Error: %d\n", errno);