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-rw-r--r--games/pom/pom.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/games/pom/pom.c b/games/pom/pom.c
index d56932e..26cd9e4 100644
--- a/games/pom/pom.c
+++ b/games/pom/pom.c
@@ -57,7 +57,9 @@ static const char sccsid[] = "@(#)pom.c 8.1 (Berkeley) 5/31/93";
#include <stdio.h>
#include <math.h>
-#define PI 3.141592654
+#ifndef PI
+#define PI 3.14159265358979323846
+#endif
#define EPOCH 85
#define EPSILONg 279.611371 /* solar ecliptic long at EPOCH */
#define RHOg 282.680403 /* solar ecliptic long of perigee at EPOCH */
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