1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Expr/Expr.cpp b/lib/Expr/Expr.cpp
index 763a4be1..4d9e5abe 100644
--- a/lib/Expr/Expr.cpp
+++ b/lib/Expr/Expr.cpp
@@ -423,7 +423,7 @@ ref<ConstantExpr> ConstantExpr::AShr(const ref<ConstantExpr> &RHS) {
 }
 
 ref<ConstantExpr> ConstantExpr::Not() {
-  return ConstantExpr::alloc(value == 0, Expr::Bool);
+  return ConstantExpr::alloc(~value);
 }
 
 ref<ConstantExpr> ConstantExpr::Eq(const ref<ConstantExpr> &RHS) {