diff --git a/pico_keys_sdk_import.cmake b/pico_keys_sdk_import.cmake
index 45bb1c3..06f7a55 100644
--- a/pico_keys_sdk_import.cmake
+++ b/pico_keys_sdk_import.cmake
@@ -137,6 +137,12 @@ set(MBEDTLS_SOURCES
     ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/poly1305.c
     ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/ripemd160.c
     ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/des.c
+    ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/x509write_crt.c
+    ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/x509_create.c
+    ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/x509write_csr.c
+    ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/pk.c
+    ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/pk_wrap.c
+    ${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/pkwrite.c
 )
 
 set(SOURCES ${SOURCES}
diff --git a/src/pico_keys.h b/src/pico_keys.h
index 5ad9b27..8f5675f 100644
--- a/src/pico_keys.h
+++ b/src/pico_keys.h
@@ -73,6 +73,7 @@ static inline void put_uint16_t(uint16_t n, uint8_t *b) {
 }
 
 extern void low_flash_available();
+extern int flash_clear_file(file_t *file);
 
 extern void timeout_stop();
 extern void timeout_start();
diff --git a/src/usb/hid/hid.c b/src/usb/hid/hid.c
index 7b8a23f..73bd41b 100644
--- a/src/usb/hid/hid.c
+++ b/src/usb/hid/hid.c
@@ -429,11 +429,6 @@ int driver_process_usb_packet_hid(uint16_t read) {
             memset(ctap_resp, 0, 64);
             ctap_resp->cid = ctap_req->cid;
             ctap_resp->init.cmd = ctap_req->init.cmd;
-#ifdef ENABLE_EMULATION
-            struct {
-                uint8_t id[8];
-            } rpiid = { 0 };
-#endif
             memcpy(ctap_resp->init.data, pico_serial.id, sizeof(pico_serial.id));
             ctap_resp->init.bcntl = 16;
             hid_write(64);