diff --git a/include/interface/ESP32CryptoSource.h b/include/interface/ESP32CryptoSource.h
index cb1d5fb..b8bcaa5 100644
--- a/include/interface/ESP32CryptoSource.h
+++ b/include/interface/ESP32CryptoSource.h
@@ -3,7 +3,7 @@
 #include "relay/interface/CryptoSource.h"
 #include "ESP32NoiseSource.h"
 
-class ESP32CryptoSource: CryptoSource {
+class ESP32CryptoSource: public CryptoSource {
 
 public:
 
diff --git a/include/interface/ESP32StorageSource.h b/include/interface/ESP32StorageSource.h
index 91ba815..ddfa641 100644
--- a/include/interface/ESP32StorageSource.h
+++ b/include/interface/ESP32StorageSource.h
@@ -1,7 +1,7 @@
 
 #include "relay/interface/StorageSource.h"
 
-class ESP32StorageSource: StorageSource {
+class ESP32StorageSource: public StorageSource {
 
     bool writeByteAtIndex(uint8_t byte, uint16_t index) override;