diff --git a/monitor/filter_exception_decoder.py b/monitor/filter_exception_decoder.py
index 92d41fe..471d809 100644
--- a/monitor/filter_exception_decoder.py
+++ b/monitor/filter_exception_decoder.py
@@ -18,7 +18,7 @@
 import sys
 
 from platformio.commands.device import DeviceMonitorFilter
-from platformio.compat import get_filesystem_encoding, path_to_unicode
+from platformio.compat import path_to_unicode, WINDOWS, PY2
 from platformio.project.exception import PlatformioException
 from platformio.project.helpers import load_project_ide_data
 
@@ -251,18 +251,24 @@ def take_stack_lines(self):
 
     def get_lines(self, addresses):
         result = []
-        enc = get_filesystem_encoding()
-        args = (self.addr2line_path, "-fipC", "-e", self.firmware_path)
-        args = [a.encode(enc) for a in args]
+
+        enc = "mbcs" if WINDOWS else "utf-8"
+        args = [self.addr2line_path, u"-fipC", u"-e", self.firmware_path]
+        if PY2:
+            args = [a.encode(enc) for a in args]
+
         for addr in addresses:
             if not self.is_addr_ok(addr):
                 result.append(None)
                 continue
 
+            if PY2:
+                addr = addr.encode(enc)
+
             to_append = None
             try:
                 output = (
-                    subprocess.check_output(args + [addr.encode(enc)])
+                    subprocess.check_output(args + [addr])
                     .decode(enc)
                     .strip()
                 )