diff --git a/src/maths/cmaths/cmath1.c b/src/maths/cmaths/cmath1.c
index 34ddc9ca1..8389fea4a 100644
--- a/src/maths/cmaths/cmath1.c
+++ b/src/maths/cmaths/cmath1.c
@@ -875,10 +875,10 @@ cx_atanh(void* data, short int type, int length, int* newlength, short int* newt
         int i;
         for (i = 0; i < length; i++) {
 #ifdef _MSC_VER
-            _Dcomplex midin = _Cbuild(cc[i].cx_real, cc[i].cx_imag);
+            _Dcomplex midin = _Cbuild(degtorad(realpart(cc[i])), degtorad(imagpart(cc[i])));
             _Dcomplex midout = catanh(midin);
 #else
-            double complex midin = cc[i].cx_real + _Complex_I * cc[i].cx_imag;
+            double complex midin = degtorad(realpart(cc[i])) + _Complex_I * degtorad(imagpart(cc[i]));
             double complex midout = catanh(midin);
 #endif
             d[i].cx_real = creal(midout);