diff --git a/src/App/Origin.cpp b/src/App/Origin.cpp
index e27db624e..eafaf279e 100644
--- a/src/App/Origin.cpp
+++ b/src/App/Origin.cpp
@@ -36,6 +36,9 @@
 
 #include "Origin.h"
 
+#ifndef M_PI
+#define M_PI       3.14159265358979323846
+#endif
 
 using namespace App;
 
diff --git a/src/App/OriginGroup.cpp b/src/App/OriginGroup.cpp
index f4b6b4d6a..933da323b 100644
--- a/src/App/OriginGroup.cpp
+++ b/src/App/OriginGroup.cpp
@@ -20,6 +20,7 @@
  *                                                                         *
  ***************************************************************************/
 
+#include "PreCompiled.h"
 #include "OriginGroup.h"
 
 #ifndef _PreComp_