1 files changed, 2 insertions, 0 deletions

diff --git a/physics.c b/physics.c
index 5bc2e5b..d0c6ae8 100644
--- a/physics.c
+++ b/physics.c
@@ -4,6 +4,8 @@
 #include "dat.h"
 #include "fns.h"
 
+static double G = 6.674e-11;
+
 /*
  *	Dynamics stepper
  */