diff --git a/interfaces/python_minimal/setup.cfg.in b/interfaces/python_minimal/setup.cfg.in
index 96e0c6995..2d96c75ed 100644
--- a/interfaces/python_minimal/setup.cfg.in
+++ b/interfaces/python_minimal/setup.cfg.in
@@ -45,4 +45,4 @@ console_scripts =
     ck2yaml = cantera.ck2yaml:script_entry_point
     cti2yaml = cantera.cti2yaml:main
     ctml2yaml = cantera.ctml2yaml:main
-	yaml2ck = cantera.yaml2ck:main
+    yaml2ck = cantera.yaml2ck:main
diff --git a/interfaces/python_sdist/setup.cfg.in b/interfaces/python_sdist/setup.cfg.in
index 41d122a6d..66e560591 100644
--- a/interfaces/python_sdist/setup.cfg.in
+++ b/interfaces/python_sdist/setup.cfg.in
@@ -67,4 +67,4 @@ console_scripts =
     ck2yaml = cantera.ck2yaml:script_entry_point
     cti2yaml = cantera.cti2yaml:main
     ctml2yaml = cantera.ctml2yaml:main
-	yaml2ck = cantera.yaml2ck:main
+    yaml2ck = cantera.yaml2ck:main