diff --git a/cwMath.cpp b/cwMath.cpp
index 9f855d3..d5a737a 100644
--- a/cwMath.cpp
+++ b/cwMath.cpp
@@ -93,7 +93,7 @@ void cw::math::doubleToX80(double val, unsigned char rate[10])
 
 bool		cw::math::isPowerOfTwo( unsigned x )
 {
-  return !( (x < 2) || (x & (x-1)) );
+  return x==1 || (!( (x < 2) || (x & (x-1)) ));
 }
 
 unsigned 	cw::math::nextPowerOfTwo(	unsigned val )