diff --git a/src/include/ngspice/numconst.h b/src/include/ngspice/numconst.h
index 52c14c2a0..1d860605a 100644
--- a/src/include/ngspice/numconst.h
+++ b/src/include/ngspice/numconst.h
@@ -17,7 +17,7 @@ Authors: 1987 Karti Mayaram, 1991 David Gates
 #ifdef PI
 #undef PI
 #endif
-#define  PI		3.14159265358973923846264338327950288419716939937511
+#define  PI	        3.14159265358979323846264338327950288419716939937511
 #define  TWO_PI		(2.0 * PI)
 #define  ROOT_TWO	1.41421356237309504880168872420969807856967187537694