diff --git a/source/SoundTouch/SoundTouch.cpp b/source/SoundTouch/SoundTouch.cpp
index 695a21f..e504cf5 100644
--- a/source/SoundTouch/SoundTouch.cpp
+++ b/source/SoundTouch/SoundTouch.cpp
@@ -317,7 +317,7 @@ void SoundTouch::putSamples(const SAMPLETYPE *samples, uint nSamples)
         pTDStretch->putSamples(samples, nSamples);
     } 
     */
-#ifndef _PREVENT_CLICK_AT_RATE_CROSSOVER
+#ifndef PREVENT_CLICK_AT_RATE_CROSSOVER
     else if (rate <= 1.0f) 
     {
         // transpose the rate down, output the transposed sound to tempo changer buffer