diff --git a/lib/timer.c b/lib/timer.c
index be695114..a5abbcc4 100644
--- a/lib/timer.c
+++ b/lib/timer.c
@@ -255,7 +255,7 @@ timer_init(void)
 btime
 tm_parse_time(const char *x)
 {
-  struct tm tm;
+  struct tm tm = {};
   int usec, n1, n2, n3, r;
 
   r = sscanf(x, "%d-%d-%d%n %d:%d:%d%n.%d%n",