diff --git a/libraries/WiFi/src/WiFi.cpp b/libraries/WiFi/src/WiFi.cpp
index 6ad89d619..ef919dbb9 100644
--- a/libraries/WiFi/src/WiFi.cpp
+++ b/libraries/WiFi/src/WiFi.cpp
@@ -213,12 +213,13 @@ int arduino::WiFiClass::setSSID(const char* ssid) {
 
 int8_t arduino::WiFiClass::scanNetworks() {
   connected_ap = SSID_MAX_COUNT;
-  uint8_t count = SSID_MAX_COUNT;
   if (ap_list != nullptr) {
-    free(ap_list);
+    delete[]ap_list;
+    ap_list = nullptr;
   }
-  ap_list = new WiFiAccessPoint[count];
-  return wifi_if->scan(ap_list, count);
+
+  ap_list = new WiFiAccessPoint[SSID_MAX_COUNT];
+  return wifi_if->scan(ap_list, SSID_MAX_COUNT);
 }
 
 char* arduino::WiFiClass::SSID(uint8_t networkItem) {