diff --git a/CMakeLists.txt b/CMakeLists.txt
index 901f9e79..3468192d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -152,6 +152,7 @@ endif()
 # Check if PIP support fftw3 for PIFFT using in math module
 if(FFTW)
 	message(STATUS "Building with fftw3 support")
+#	find_library(${fftw3} ${LIB_})
 	add_definitions(-DPIP_FFTW)
 	if(WIN32)
 		add_definitions(-DPIP_FFTW_THREADSAFE)
diff --git a/src/math/pimathcomplex.h b/src/math/pimathcomplex.h
index 085d47c6..e6370711 100644
--- a/src/math/pimathcomplex.h
+++ b/src/math/pimathcomplex.h
@@ -11,15 +11,17 @@ using std::complex;
 
 typedef complex<int> complexi;
 typedef complex<float> complexf;
-typedef complex<double> complexd;
 typedef complex<ldouble> complexld;
+#ifndef QPIEVALUATOR_COMPLEX
+typedef complex<double> complexd;
 
-const complexld complexld_i(0., 1.);
-const complexld complexld_0(0.);
-const complexld complexld_1(1.);
 const complexd complexd_i(0., 1.);
 const complexd complexd_0(0.);
 const complexd complexd_1(1.);
+#endif
+const complexld complexld_i(0., 1.);
+const complexld complexld_0(0.);
+const complexld complexld_1(1.);
 
 __PICONTAINERS_SIMPLE_TYPE__(complexi)
 __PICONTAINERS_SIMPLE_TYPE__(complexf)