diff --git a/scripts/decodetree.py b/scripts/decodetree.py
index b559db3086..7af6b3056d 100755
--- a/scripts/decodetree.py
+++ b/scripts/decodetree.py
@@ -371,7 +371,7 @@ class Pattern(General):
 # end Pattern
 
 
-class MultiPattern(General):
+class IncMultiPattern(General):
     """Class representing an overlapping set of instruction patterns"""
 
     def __init__(self, lineno, pats, fixb, fixm, udfm, w):
@@ -410,7 +410,7 @@ class MultiPattern(General):
                 output(ind, '}\n')
             else:
                 p.output_code(i, extracted, p.fixedbits, p.fixedmask)
-#end MultiPattern
+#end IncMultiPattern
 
 
 def parse_field(lineno, name, toks):
@@ -751,8 +751,8 @@ def parse_generic(lineno, is_format, name, toks):
                           .format(allbits ^ insnmask))
 # end parse_general
 
-def build_multi_pattern(lineno, pats):
-    """Validate the Patterns going into a MultiPattern."""
+def build_incmulti_pattern(lineno, pats):
+    """Validate the Patterns going into a IncMultiPattern."""
     global patterns
     global insnmask
 
@@ -792,9 +792,9 @@ def build_multi_pattern(lineno, pats):
         else:
             repeat = False
 
-    mp = MultiPattern(lineno, pats, fixedbits, fixedmask, undefmask, width)
+    mp = IncMultiPattern(lineno, pats, fixedbits, fixedmask, undefmask, width)
     patterns.append(mp)
-# end build_multi_pattern
+# end build_incmulti_pattern
 
 def parse_file(f):
     """Parse all of the patterns within a file"""
@@ -860,7 +860,7 @@ def parse_file(f):
                 error(start_lineno, 'indentation ', indent, ' != ', nesting)
             pats = patterns
             patterns = saved_pats.pop()
-            build_multi_pattern(lineno, pats)
+            build_incmulti_pattern(lineno, pats)
             toks = []
             continue