diff --git a/sonic-chassisd/scripts/chassisd b/sonic-chassisd/scripts/chassisd
index 50b767725..b371f1fee 100644
--- a/sonic-chassisd/scripts/chassisd
+++ b/sonic-chassisd/scripts/chassisd
@@ -8,6 +8,7 @@
 """
 
 try:
+    import os
     import signal
     import sys
     import threading
diff --git a/sonic-thermalctld/scripts/thermalctld b/sonic-thermalctld/scripts/thermalctld
index dd3b83a9d..592e21104 100644
--- a/sonic-thermalctld/scripts/thermalctld
+++ b/sonic-thermalctld/scripts/thermalctld
@@ -6,6 +6,7 @@
 """
 
 try:
+    import os
     import signal
     import threading
     import time