diff --git a/src/cminusfc/main.cpp b/src/cminusfc/main.cpp
index 7d891f08fad8a3bda0c09a188033d0901f78e14c..aae8ec0d6b01bd0881e7b9149a21b2c90ad69721 100755
--- a/src/cminusfc/main.cpp
+++ b/src/cminusfc/main.cpp
@@ -65,7 +65,6 @@ int main(int argc, char** argv) {
         PassManager PM(m);
         // optimization 
         if (config.mem2reg) {
-            PM.add_pass<DeadCode>(true);
             PM.add_pass<Mem2Reg>();
             PM.add_pass<DeadCode>(false);
         }