diff --git a/WiFiManager.cpp b/WiFiManager.cpp
index ec235e8e6..2e7884d3d 100644
--- a/WiFiManager.cpp
+++ b/WiFiManager.cpp
@@ -308,11 +308,13 @@ int WiFiManager::connectWifi(String ssid, String pass) {
   DEBUG_WM ("Connection result: ");
   DEBUG_WM ( connRes );
   //not connected, WPS enabled, no pass - first attempt
+  #ifdef NO_EXTRA_4K_HEAP
   if (_tryWPS && connRes != WL_CONNECTED && pass == "") {
     startWPS();
     //should be connected at the end of WPS
     connRes = waitForConnectResult();
   }
+  #endif
   return connRes;
 }