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-rw-r--r--includes/defines.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/includes/defines.h b/includes/defines.h
index 2aed702..88997b0 100644
--- a/includes/defines.h
+++ b/includes/defines.h
@@ -21,6 +21,9 @@
#ifndef M_PI
#define M_PI 3.14159265f
#endif
+#ifndef M_GRAV
+#define M_GRAV 6.67300e-1
+#endif
#define IMGCONNS 3
#define TIMEOUT 100