diff --git a/src/boards/rainbow.cpp b/src/boards/rainbow.cpp
index 15ce832d..9279af4c 100644
--- a/src/boards/rainbow.cpp
+++ b/src/boards/rainbow.cpp
@@ -87,7 +87,6 @@ static uint16 prg[11]; // 0: $5000, 1: $6000, 2: $7000, 3: $8000, 4: $9000, etc
 static uint8 chr_chip, chr_spr_ext_mode, chr_mode;
 static uint16 chr[16];
 
-static uint8 RNBWHackNTbank[5];
 static uint8 SPR_bank_offset;
 static uint8 SPR_bank[64];
 
diff --git a/src/boards/rainbow_esp.h b/src/boards/rainbow_esp.h
index 3858c687..e6abbd62 100644
--- a/src/boards/rainbow_esp.h
+++ b/src/boards/rainbow_esp.h
@@ -72,12 +72,12 @@ struct WorkingFile
 class BrokeStudioFirmware {
 public:
 	BrokeStudioFirmware();
-	~BrokeStudioFirmware();
+	virtual ~BrokeStudioFirmware();
 
 	void rx(uint8 v);
 	uint8 tx();
 
-	virtual bool getDataReadyIO();
+	bool getDataReadyIO();
 
 private:
 	// Defined message types from CPU to ESP