2 files changed, 2 insertions, 2 deletions
diff --git a/rt/tst-mqueue5.c b/rt/tst-mqueue5.c
index 70d97a36c2..2b19b6a031 100644
--- a/rt/tst-mqueue5.c
+++ b/rt/tst-mqueue5.c
@@ -58,7 +58,7 @@ rtmin_handler (int sig, siginfo_t *info, void *ctx)
 static int
 (mqsend) (mqd_t q, int line)
 {
-  char c;
+  char c = 0;
   if (mq_send (q, &c, 1, 1) != 0)
     {
       printf ("mq_send on line %d failed with: %m\n", line);
diff --git a/rt/tst-mqueue6.c b/rt/tst-mqueue6.c
index bc875f101e..a22ac05aca 100644
--- a/rt/tst-mqueue6.c
+++ b/rt/tst-mqueue6.c
@@ -40,7 +40,7 @@
 static int
 (mqsend) (mqd_t q, int line)
 {
-  char c;
+  char c = 0;
   if (mq_send (q, &c, 1, 1) != 0)
     {
       printf ("mq_send on line %d failed with: %m\n", line);