diff --git a/src/fs/otp.c b/src/fs/otp.c
index 388b52f..6e28e9b 100644
--- a/src/fs/otp.c
+++ b/src/fs/otp.c
@@ -168,8 +168,10 @@ int otp_enable_secure_boot(uint8_t bootkey, bool secure_lock) {
         uint8_t flagsp2[] = { page2v, page2v, page2v, 0x00 };
         PICOKEY_CHECK(otp_write_data_raw(OTP_DATA_PAGE2_LOCK1_ROW, flagsp2, sizeof(flagsp2)));
     }
-
+#elif defined(ESP_PLATFORM)
+    // TODO: Implement secure boot for ESP32-S3
 #endif // PICO_RP2350
+    goto err;
     err:
     if (ret != PICOKEY_OK) {
         return ret;
diff --git a/src/fs/otp.h b/src/fs/otp.h
index 2d55e0d..1936328 100644
--- a/src/fs/otp.h
+++ b/src/fs/otp.h
@@ -32,8 +32,6 @@ extern uint8_t* otp_buffer_raw(uint16_t row);
 extern bool is_empty_otp_buffer(uint16_t row, uint16_t len);
 extern int otp_write_data(uint16_t row, uint8_t *data, uint16_t len);
 extern int otp_write_data_raw(uint16_t row, uint8_t *data, uint16_t len);
-extern int otp_enable_secure_boot(uint8_t bootkey, bool secure_lock);
-extern void init_otp_files();
 
 #elif defined(ESP_PLATFORM)
 
@@ -44,6 +42,9 @@ extern void init_otp_files();
 
 #endif
 
+extern int otp_enable_secure_boot(uint8_t bootkey, bool secure_lock);
+extern void init_otp_files();
+
 extern const uint8_t *otp_key_1;
 extern const uint8_t *otp_key_2;
 
diff --git a/src/rescue.c b/src/rescue.c
index e9e048c..c90b264 100644
--- a/src/rescue.c
+++ b/src/rescue.c
@@ -78,6 +78,7 @@ int cmd_write() {
     return SW_OK();
 }
 
+#if defined(PICO_RP2350) || defined(ESP_PLATFORM)
 int cmd_secure() {
     if (apdu.nc != 0) {
         return SW_WRONG_LENGTH();
@@ -92,13 +93,16 @@ int cmd_secure() {
     }
     return SW_OK();
 }
+#endif
 
 #define INS_WRITE            0x1C
 #define INS_SECURE           0x1D
 
 static const cmd_t cmds[] = {
     { INS_WRITE, cmd_write },
+#if defined(PICO_RP2350) || defined(ESP_PLATFORM)
     { INS_SECURE, cmd_secure },
+#endif
     { 0x00, 0x0 }
 };