diff --git a/log.c b/log.c
index cd1ed5362..236903382 100644
--- a/log.c
+++ b/log.c
@@ -42,7 +42,7 @@ int log_init(const char *output)
 	}
 
 	if (output) {
-		new_logfd = open(output, O_CREAT | O_WRONLY | O_APPEND, 0600);
+		new_logfd = open(output, O_CREAT | O_TRUNC | O_WRONLY | O_APPEND, 0600);
 		if (new_logfd < 0) {
 			pr_perror("Can't create log file %s", output);
 			return -1;