diff --git a/examples/companion_radio/MyMesh.cpp b/examples/companion_radio/MyMesh.cpp
index 880d67bee..425e60964 100644
--- a/examples/companion_radio/MyMesh.cpp
+++ b/examples/companion_radio/MyMesh.cpp
@@ -3055,7 +3055,7 @@ void MyMesh::handleCmdFrame(size_t len) {
 #endif
   } else if (cmd_frame[0] == CMD_SEND_RAW_DATA && len >= 6) {
     int i = 1;
-    int8_t path_len = cmd_frame[i++];
+    uint8_t path_len = cmd_frame[i++];
     if (path_len >= 0 && mesh::Packet::isValidPathLen(path_len)) {
       uint8_t path[MAX_PATH_SIZE];
       i += mesh::Packet::writePath(path, &cmd_frame[i], path_len);
diff --git a/platformio.ini b/platformio.ini
index e82bd6747..9e5091917 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -114,6 +114,7 @@ platform_packages =
   ; https://github.com/meshcore-dev/MeshCore/pull/1177
   ; https://github.com/meshcore-dev/MeshCore/pull/1295
   framework-arduinoadafruitnrf52 @ https://github.com/meshcore-dev/Adafruit_nRF52_Arduino#d541301
+  platformio/toolchain-gccarmnoneeabi@^1.140201.0
 extra_scripts = create-uf2.py
 build_flags = ${arduino_base.build_flags}
   -D NRF52_PLATFORM
diff --git a/src/armstubs.cpp b/src/armstubs.cpp
new file mode 100644
index 000000000..30da40ecf
--- /dev/null
+++ b/src/armstubs.cpp
@@ -0,0 +1,9 @@
+// https://github.com/meshcore-dev/MeshCore/issues/2469
+// armstubs.cpp exists to silence warnings introduced after upgrading platformio/toolchain-gccarmnoneeabi
+extern "C" __attribute__((weak)) int _close(int fd)  { return -1; }
+extern "C" __attribute__((weak)) int _lseek(int fd, int offset, int whence) { return 0; }
+extern "C" __attribute__((weak)) int _read(int fd, char *buf, int len)  { return 0; }
+extern "C" __attribute__((weak)) int _fstat(int fd, struct stat *st) { return 0; }
+extern "C" __attribute__((weak)) int _isatty(int fd) { return 1; }
+extern "C" __attribute__((weak)) int _getpid(void) { return 1; }
+extern "C" __attribute__((weak)) int _kill(int pid, int sig) { return -1; }