diff --git a/Template Project/lib/ESPMegaPRO/ESPMegaPRO_OOP.cpp b/Template Project/lib/ESPMegaPRO/ESPMegaPRO_OOP.cpp
index 0aa8649..724f0dc 100644
--- a/Template Project/lib/ESPMegaPRO/ESPMegaPRO_OOP.cpp	
+++ b/Template Project/lib/ESPMegaPRO/ESPMegaPRO_OOP.cpp	
@@ -30,7 +30,7 @@ void ESPMegaPRO::loop() {
     }   
 }
 bool ESPMegaPRO::installCard(uint8_t slot, ExpansionCard* card) {
-    if (slot > 255) return;
+    if (slot > 255) return false;
     if (cardInstalled[slot]) {
         Serial.println("Card already installed");
         return false;