diff --git a/hpvm/include/SupportVISC/DFG2LLVM.h b/hpvm/include/SupportVISC/DFG2LLVM.h
index a2d17801ff2a61cded3822475c6f6c44c0821d9a..bf250dd5d35f5d0876cfe1cd66eb71e0cd45ac38 100644
--- a/hpvm/include/SupportVISC/DFG2LLVM.h
+++ b/hpvm/include/SupportVISC/DFG2LLVM.h
@@ -27,7 +27,7 @@ using namespace builddfg;
 #define TIMER(X) do { if (VISCTimer) { X; } } while (0)
 #define DECLARE(X) X = M.getOrInsertFunction(#X, \
     runtimeModule->getFunction(#X)->getFunctionType()); \
-    DEBUG(errs() << *X)
+    //DEBUG(errs() << *X)
 
 namespace dfg2llvm {
 // Helper Functions
@@ -76,9 +76,9 @@ protected:
   // VISC Runtime API
   std::unique_ptr<Module> runtimeModule;
 
-  Constant* llvm_visc_initializeTimerSet;
-  Constant* llvm_visc_switchToTimer;
-  Constant* llvm_visc_printTimerSet;
+  FunctionCallee llvm_visc_initializeTimerSet;
+  FunctionCallee llvm_visc_switchToTimer;
+  FunctionCallee llvm_visc_printTimerSet;
   GlobalVariable* TimerSet;
   GlobalVariable* GraphIDAddr;
   Instruction* InitCall;