diff --git a/sourceCode/SG_baseFunc.cpp b/sourceCode/SG_baseFunc.cpp
index 19cce52..ee8686f 100644
--- a/sourceCode/SG_baseFunc.cpp
+++ b/sourceCode/SG_baseFunc.cpp
@@ -7,6 +7,11 @@
 #include <math.h>
 #endif // __WIN32
 
+#ifndef M_PI
+#define M_PI 3.141592654
+#endif // !M_PI
+
+
 #include <cmath>
 
 SVzNL3DRangeD sg_getScanDataROI(