diff --git a/src_main/math/pimathcomplex.h b/src_main/math/pimathcomplex.h
index 254c25b2..28d78ca3 100644
--- a/src_main/math/pimathcomplex.h
+++ b/src_main/math/pimathcomplex.h
@@ -68,9 +68,16 @@ inline complexd sign(const complexd & x) {return complexd(sign(x.real()), sign(x
 inline complexd round(const complexd & c) {return complexd(piRound<double>(c.real()), piRound<double>(c.imag()));}
 inline complexd floor(const complexd & c) {return complexd(floor(c.real()), floor(c.imag()));}
 inline complexd ceil(const complexd & c) {return complexd(ceil(c.real()), ceil(c.imag()));}
+
+#ifdef PIP_CXX11_SUPPORT
+#  define acosc acos
+#  define asinc asin
+#  define atanc atan
+#else
 inline complexd atanc(const complexd & c) {return -complexd(-0.5, 1.) * log((complexd_1 + complexd_i * c) / (complexd_1 - complexd_i * c));}
 inline complexd asinc(const complexd & c) {return -complexd_i * log(complexd_i * c + sqrt(complexd_1 - c * c));}
 inline complexd acosc(const complexd & c) {return -complexd_i * log(c + complexd_i * sqrt(complexd_1 - c * c));}
+#endif
 
 #ifdef CC_GCC
 #  if CC_GCC_VERSION <= 0x025F