diff --git a/source/code/sago/SagoSprite.cpp b/source/code/sago/SagoSprite.cpp
index 7b6297e..c116e3e 100644
--- a/source/code/sago/SagoSprite.cpp
+++ b/source/code/sago/SagoSprite.cpp
@@ -25,6 +25,11 @@ SOFTWARE.
 #include "SagoSprite.hpp"
 #include <iostream>
 
+#ifndef M_PI
+// M_PI is a custom extension that most C++ toolchains provide. Out Windows compiler does not provide it.
+# define M_PI 3.14159265358979323846
+#endif
+
 namespace sago {
 
 struct SagoSprite::SagoSpriteData {
@@ -168,4 +173,4 @@ int SagoSprite::GetHeight() const {
 	return data->imgCord.h;
 }
 
-}  //namespace sago
\ No newline at end of file
+}  //namespace sago