diff --git a/arch/sim/src/sim/sim_wifidriver.c b/arch/sim/src/sim/sim_wifidriver.c
index 3681e5e7f5..dc6f6e2d9f 100644
--- a/arch/sim/src/sim/sim_wifidriver.c
+++ b/arch/sim/src/sim/sim_wifidriver.c
@@ -594,6 +594,10 @@ get_scan:
       goto get_scan;
     }
 
+  /* Add a terminator for the rbuf */
+
+  rbuf[ret] = '\0';
+
   ret = -EAGAIN;
   for (p = rbuf; *p != '\0'; p++)
     {