diff --git a/radio/src/targets/simu/simpgmspace.cpp b/radio/src/targets/simu/simpgmspace.cpp
index 1b01dd021..99ca105a1 100644
--- a/radio/src/targets/simu/simpgmspace.cpp
+++ b/radio/src/targets/simu/simpgmspace.cpp
@@ -100,7 +100,7 @@ uint64_t simuTimerMicros(void)
   // read the timer
   QueryPerformanceCounter(&newTick);
   // compute the elapsed time
-  return U64((newTick.QuadPart - firstTick.QuadPart) * freqScale);
+  return (newTick.QuadPart - firstTick.QuadPart) * freqScale;
 
 #else  // GNUC