diff --git a/source/Math/Logarithm.cpp b/source/Math/Logarithm.cpp
index 9aa7f03..4fe83eb 100644
--- a/source/Math/Logarithm.cpp
+++ b/source/Math/Logarithm.cpp
@@ -5,8 +5,6 @@
 
 namespace sp {
 
-#define	LOG2INBASE10 0.30102999566f
-
 double math::log(double base, double value) {
 
 	return ::log10(value) / ::log10(base);
@@ -14,7 +12,7 @@ double math::log(double base, double value) {
 
 double math::log2(double value) {
 
-	return ::log10(value) / LOG2INBASE10;
+	return ::log2(value);
 }
 
 } // namespace sp