diff --git a/SecretsManagerRDSOracleRotationMultiUser/lambda_function.py b/SecretsManagerRDSOracleRotationMultiUser/lambda_function.py
index 292eb7d6..8f0077bc 100644
--- a/SecretsManagerRDSOracleRotationMultiUser/lambda_function.py
+++ b/SecretsManagerRDSOracleRotationMultiUser/lambda_function.py
@@ -50,6 +50,9 @@ def lambda_handler(event, context):
 
     """
 
+    # Thick client to match functionality of cx_oracle
+    oracledb.init_oracle_client()
+
     arn = event['SecretId']
     token = event['ClientRequestToken']
     step = event['Step']
diff --git a/SecretsManagerRDSOracleRotationSingleUser/lambda_function.py b/SecretsManagerRDSOracleRotationSingleUser/lambda_function.py
index 9850b98a..0715e856 100644
--- a/SecretsManagerRDSOracleRotationSingleUser/lambda_function.py
+++ b/SecretsManagerRDSOracleRotationSingleUser/lambda_function.py
@@ -45,6 +45,9 @@ def lambda_handler(event, context):
 
     """
 
+    # Thick client to match functionality of cx_oracle
+    oracledb.init_oracle_client()
+
     arn = event['SecretId']
     token = event['ClientRequestToken']
     step = event['Step']