diff --git a/tools/mkssldef.py b/tools/mkssldef.py
index 3ff53531667417..0d2ef29528f4f8 100755
--- a/tools/mkssldef.py
+++ b/tools/mkssldef.py
@@ -33,6 +33,8 @@
       assert meta[2] in ('FUNCTION', 'VARIABLE')
       if meta[0] != 'EXIST': continue
       if meta[2] != 'FUNCTION': continue
+      # In cases where meta[3] is 'DEPRECATEDIN_X_Y,CATEGORY'
+      meta[3] = meta[3].split(',')[-1]
       def satisfy(expr, rules):
         def test(expr):
           if expr.startswith('!'): return not expr[1:] in rules