diff --git a/sapfor/experts/Sapfor_2017/_src/Transformations/dead_code.cpp b/sapfor/experts/Sapfor_2017/_src/Transformations/dead_code.cpp
index 6f724b5..3535963 100644
--- a/sapfor/experts/Sapfor_2017/_src/Transformations/dead_code.cpp
+++ b/sapfor/experts/Sapfor_2017/_src/Transformations/dead_code.cpp
@@ -41,7 +41,7 @@ static void updateUseDefForInstruction(SAPFOR::BasicBlock* block, SAPFOR::Instru
         {
             if (use.find(r) != use.end() || 
                 r->getMemType() != SAPFOR::CFG_MEM_TYPE::LOCAL_ || 
-                r->getType() != SAPFOR::CFG_ARG_TYPE::VAR)
+                !(r->getType() == SAPFOR::CFG_ARG_TYPE::VAR || r->getType() == SAPFOR::CFG_ARG_TYPE::REG))
             {
                 useful = true;
                 break;