diff --git a/src/main.cpp b/src/main.cpp
index 3044340..1d31057 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -16,7 +16,7 @@ Intel(R) 64 and IA-32 Architectures Software Developer's Manual Volume 3 (3A, 3B
 
  */
 
-
+//#ifdef WIN64
 
 #ifndef DEBUG
     #define DEBUG
@@ -40,9 +40,10 @@ bool checkInvariantTSC(){
 uint64_t rdtsc() {
     uint64_t raxlo,rdxho;
     asm volatile ( ".intel_syntax noprefix\t\n"
-				   "cpuid\n" \
+				   "lfence\n" \
+   				   "rdtsc\n" \
 				   //"rdtscp\n" : "=a" (raxlo), "=d" (rdxho), "=c" (aux) : : );
-				   "rdtscp\n" : "=a" (raxlo), "=d" (rdxho));
+				   "lfence\n" : "=a" (raxlo), "=d" (rdxho));
     return (rdxho << 32) + raxlo; //|
 }