diff --git a/tools/idf_monitor.py b/tools/idf_monitor.py
index 7b744b6081..40f2e83717 100755
--- a/tools/idf_monitor.py
+++ b/tools/idf_monitor.py
@@ -1010,7 +1010,7 @@ def main():
         '--disable-address-decoding', '-d',
         help="Don't print lines about decoded addresses from the application ELF file.",
         action='store_true',
-        default=True if os.environ.get('ESP_MONITOR_DECODE') == 0 else False
+        default=os.getenv('ESP_MONITOR_DECODE') == '0'
     )
 
     parser.add_argument(