diff --git a/Generals/Code/GameEngine/Include/Common/PerfTimer.h b/Generals/Code/GameEngine/Include/Common/PerfTimer.h
index effaac47d1c..dbfd0d340d4 100644
--- a/Generals/Code/GameEngine/Include/Common/PerfTimer.h
+++ b/Generals/Code/GameEngine/Include/Common/PerfTimer.h
@@ -55,7 +55,7 @@ class DebugDisplayInterface;
 //-------------------------------------------------------------------------------------------------
 //-------------------------------------------------------------------------------------------------
 
-#define NO_USE_QPF	// non-QPF is much faster.
+#define USE_QPF	// QPF is safer on multi-core systems with CPU frequency scaling.
 
 #if defined(PERF_TIMERS) || defined(DUMP_PERF_STATS)
 //-------------------------------------------------------------------------------------------------
diff --git a/GeneralsMD/Code/GameEngine/Include/Common/PerfTimer.h b/GeneralsMD/Code/GameEngine/Include/Common/PerfTimer.h
index 96475bd16ce..576663038c6 100644
--- a/GeneralsMD/Code/GameEngine/Include/Common/PerfTimer.h
+++ b/GeneralsMD/Code/GameEngine/Include/Common/PerfTimer.h
@@ -55,7 +55,7 @@ class DebugDisplayInterface;
 //-------------------------------------------------------------------------------------------------
 //-------------------------------------------------------------------------------------------------
 
-#define NO_USE_QPF	// non-QPF is much faster.
+#define USE_QPF	// QPF is safer on multi-core systems with CPU frequency scaling.
 
 #if defined(PERF_TIMERS) || defined(DUMP_PERF_STATS)
 //-------------------------------------------------------------------------------------------------