diff --git a/include/ITAThirdOctaveMagnitudeSpectrum.h b/include/ITAThirdOctaveMagnitudeSpectrum.h
index b756e14aa8aa6592802fdc17299c7f5956d279ef..ac7db6ec1ac22a47bb7cf036f3dfc4702c24e290 100644
--- a/include/ITAThirdOctaveMagnitudeSpectrum.h
+++ b/include/ITAThirdOctaveMagnitudeSpectrum.h
@@ -119,7 +119,7 @@ namespace ITABase
 	  * There is no real difference between a factor and a gain except that gains are commonly used in DSP (i.e. for "gain" control
 	  * of audio signal channels) and factors are more common in acoustic materials such as absorption and transmission "factor".
 	  */
-	typedef CThirdOctaveGainMagnitudeSpectrum CITAThirdOctaveFactorMagnitudeSpectrum;
+	typedef CThirdOctaveGainMagnitudeSpectrum CThirdOctaveFactorMagnitudeSpectrum;