diff --git a/src/prompt.c b/src/prompt.c
index f5d4706..943cbf7 100644
--- a/src/prompt.c
+++ b/src/prompt.c
@@ -369,7 +369,7 @@ static void prompt_onConnectionChange(ToxWindow *self, Tox *m, int32_t friendnum
 
     ChatContext *ctx = self->chatwin;
 
-    uint8_t nick[TOX_MAX_NAME_LENGTH];
+    uint8_t nick[TOX_MAX_NAME_LENGTH] = {0};
     int n_len = tox_get_name(m, friendnum, nick);
     n_len = MIN(n_len, TOXIC_MAX_NAME_LENGTH-1);