diff --git a/pw_cli/py/pw_cli/env.py b/pw_cli/py/pw_cli/env.py
index 1943184f0..07cecfa1a 100644
--- a/pw_cli/py/pw_cli/env.py
+++ b/pw_cli/py/pw_cli/env.py
@@ -62,6 +62,8 @@ def pigweed_environment_parser() -> envparse.EnvironmentParser:
     parser.add_var('PW_CONSOLE_CONFIG_FILE')
     parser.add_var('PW_ENVIRONMENT_NO_ERROR_ON_UNRECOGNIZED')
 
+    parser.add_var('PW_CIPD_SERVICE_ACCOUNT_JSON')
+
     # RBE environment variables
     parser.add_var('PW_USE_RBE', default=False)
     parser.add_var('PW_RBE_DEBUG', default=False)