diff --git a/src/aks-preview/azext_aks_preview/custom.py b/src/aks-preview/azext_aks_preview/custom.py
index e76d26fa194..3ba4ae0b927 100644
--- a/src/aks-preview/azext_aks_preview/custom.py
+++ b/src/aks-preview/azext_aks_preview/custom.py
@@ -995,8 +995,7 @@ def _check_cluster_autoscaler_flag(enable_cluster_autoscaler,
 
 def _create_client_secret():
     # Add a special character to satsify AAD SP secret requirements
-    special_chars = '!#$%&*-+_.:;<>=?@][^}{|~'
-    special_char = special_chars[ord(os.urandom(1)) % len(special_chars)]
+    special_char = '$'
     client_secret = binascii.b2a_hex(os.urandom(10)).decode('utf-8') + special_char
     return client_secret