diff --git a/tools/ci_build/github/azure-pipelines/templates/set-python-manylinux-variables-step.yml b/tools/ci_build/github/azure-pipelines/templates/set-python-manylinux-variables-step.yml
index 1fe58a7239..68836117db 100644
--- a/tools/ci_build/github/azure-pipelines/templates/set-python-manylinux-variables-step.yml
+++ b/tools/ci_build/github/azure-pipelines/templates/set-python-manylinux-variables-step.yml
@@ -5,6 +5,7 @@ steps:
 - task: PythonScript@0
   displayName: 'Set Python manylinux variables'
   inputs:
+    pythonInterpreter: /usr/bin/python3
     scriptSource: inline
     script: |
       version = "$(PythonVersion)"