diff --git a/shell.py b/shell.py
index 04d5452..2163f35 100644
--- a/shell.py
+++ b/shell.py
@@ -54,8 +54,8 @@ def pclish_cd(path):
     except Exception:
         print("cd: no such file or directory: {}".format(path))
 
-def pclish_echo(txt):
-    print(txt)
+def pclish_echo(TXT):
+    print(TXT)
 
 def pclish_oscmd(ARGS):
     os.system(ARGS)
@@ -77,8 +77,8 @@ def pclish_ls():
 def pclish_ver():
     print(VER)
 
-def pclish_mkdir(dir):
-    os.mkdir(dir)
+def pclish_mkdir(DIR):
+    os.mkdir(DIR)
 
 def pclish_system():
     print("System: XCU Python Based Shell Env")