diff --git a/libraries/Complex/complex.cpp b/libraries/Complex/complex.cpp
index f62d602e..a9eb28b1 100644
--- a/libraries/Complex/complex.cpp
+++ b/libraries/Complex/complex.cpp
@@ -44,6 +44,7 @@ double Complex::imag()
     return im;
 }
 
+// polar2cartesian
 void Complex::polar(double modulus, double phase)
 {
     re = modulus * cos(phase);