diff --git a/scripts/projects.py b/scripts/projects.py
index 9242c694..8b745ebe 100644
--- a/scripts/projects.py
+++ b/scripts/projects.py
@@ -311,15 +311,15 @@ def os_cascade():
     name = re.sub('-.*', '', os)
     series = os
     while True:
-	n = re.sub('\.[0-9]+$', '', series)
-	if n == series:
-	    break
-	r.append(n)
+        n = re.sub('\.[0-9]+$', '', series)
+        if n == series:
+            break
+        r.append(n)
         series = n
     if not name in r:
-    	r.append(name)
+        r.append(name)
     if not os in r:
-	r.append(os)
+        r.append(os)
     # e.g. os, linux, suse, suse-tumbleweed
     #return [ 'os', platform.system().lower(), name, os ]
     glob_os_cascade = r