diff --git a/src/ProjectParameters/projectParameters.cpp b/src/ProjectParameters/projectParameters.cpp
index 6de6861..eef70c8 100644
--- a/src/ProjectParameters/projectParameters.cpp
+++ b/src/ProjectParameters/projectParameters.cpp
@@ -40,6 +40,9 @@ enum class MODE
     AFTER
 };
 
+template<typename Iterator>
+static void extract_vars_from_reg(set<SAPFOR::Argument*>& worklist, SAPFOR::Argument* reg, Iterator instr, Iterator first_instr);
+
 static tuple<FuncInfo*, SAPFOR::Instruction*, SAPFOR::BasicBlock*>
 stmtToIR(const map<FuncInfo*, vector<SAPFOR::BasicBlock*>>& CFGraph, SgStatement* stmt)
 {