diff --git a/libs/main/math/pimathcomplex.h b/libs/main/math/pimathcomplex.h
index 46d75e6b..268e7daf 100644
--- a/libs/main/math/pimathcomplex.h
+++ b/libs/main/math/pimathcomplex.h
@@ -119,10 +119,10 @@ inline PIVector2D<double> abs(const PIVector2D<complexd> & v) {
 
 
 /**
-* @brief Inline funtion of compare with zero different types
+* @brief floating point number specific comparison between value passed as parameter and zero
 *
-* @param v is input parameter of type T
-* @return true if zero, false if not zero
+* @param v floating point parameter for comparison
+* @return true if v in locality of zero, otherwise false
 */
 template<typename T, typename std::enable_if<std::is_floating_point<T>::value, int>::type = 0>
 inline bool PIMathFloatNullCompare(const T v) {
@@ -131,15 +131,15 @@ inline bool PIMathFloatNullCompare(const T v) {
 }
 
 /**
-* @brief Inline funtion of compare with zero colmplexf type
+* @brief floating point number specific comparison between parameter value and zero.
 *
-* @param v is input parameter of type colmplexf
-* @return true if zero, false if not zero
+* @param v complex with floating point real and imag parts
+* @return true if absolute of v in locality of zero, otherwise false
 */
 template<typename T,typename std::enable_if<
-			 std::is_floating_point<decltype(T::real)>::value ||
-			 std::is_floating_point<decltype(T::imag)>::value
-			 , int>::type = 0>
+		std::is_floating_point<decltype(T::real)>::value &&
+		std::is_floating_point<decltype(T::imag)>::value
+		, int>::type = 0>
 inline bool PIMathFloatNullCompare(const T v) {
 	static_assert(std::is_floating_point<decltype(v.real)>::value, "Type must be floating point");
 	static_assert(std::is_floating_point<decltype(v.imag)>::value, "Type must be floating point");