diff --git a/libImaging/Imaging.h b/libImaging/Imaging.h
index 26207d121..d958387c9 100644
--- a/libImaging/Imaging.h
+++ b/libImaging/Imaging.h
@@ -20,7 +20,7 @@ extern "C" {
 
 
 #ifndef M_PI
-#define	M_PI	3.14159265359
+#define	M_PI	3.1415926535897932384626433832795
 #endif