From 196cfdb569833eee01d8d74e5373671c0e6c0b4d Mon Sep 17 00:00:00 2001
From: Torsten Dreyer <Torsten@t3r.de>
Date: Tue, 13 Dec 2011 20:48:50 +0100
Subject: [PATCH] Fix windows build

---
 src/Radio/antenna.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Radio/antenna.cxx b/src/Radio/antenna.cxx
index bb5770fb5..8a55707d5 100644
--- a/src/Radio/antenna.cxx
+++ b/src/Radio/antenna.cxx
@@ -94,7 +94,7 @@ void FGRadioAntenna::load_NEC_antenna_pattern(string type) {
 		//cerr << "head: " << heading << " elev: " << elevation << " gain: " << gain << endl;
 		AntennaGain *datapoint = new AntennaGain;
 		datapoint->azimuth = heading;
-		datapoint->elevation = 90.0 - fabs(elevation);
+		datapoint->elevation = 90.0 - abs(elevation);
 		datapoint->gain = gain;
 		_pattern.push_back(datapoint);
 	}