1 files changed, 2 insertions, 1 deletions
diff --git a/pp2cc.py b/pp2cc.py
index 2f58f9b..81f6a79 100755
--- a/pp2cc.py
+++ b/pp2cc.py
@@ -1317,7 +1317,8 @@ class Parse(object):
                                                               linked_node))
                 if op == "-":
                     # negating a value in PP2 is flipping the WORDSIZE-th bit
-                    value = operand ^ msb
+                    value = -operand
+                    #(operand ^ (pow(2, self.WORDSIZE) - 1)) + 1
                 elif op == "~":
                     # invert all bits
                     value = operand ^ (pow(2, self.WORDSIZE) - 1)