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diff --git a/muse2/plugins/freeverb/denormals.h b/muse2/plugins/freeverb/denormals.h
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+// Macro for killing denormalled numbers
+//
+// Written by Jezar at Dreampoint, June 2000
+// http://www.dreampoint.co.uk
+// Based on IS_DENORMAL macro by Jon Watte
+// This code is public domain
+
+#ifndef _denormals_
+#define _denormals_
+
+// this does not work with at least gcc3.3 and -O2:
+// #define undenormalise(sample) if(((*(unsigned int*)&sample)&0x7f800000)==0) sample=0.0f
+//
+// from Laurent de Soras Paper: Denormal numbers in floating point
+//    signal processing applications
+// (ws)
+
+#define undenormalise(sample)       \
+      {                             \
+      float anti_denormal = 1e-18;  \
+      sample += anti_denormal;      \
+      sample -= anti_denormal;      \
+      }
+
+#endif//_denormals_
+
+//ends
+