diff -up scorchwentbonkers-1.3/src/game/FragGame.cpp~ scorchwentbonkers-1.3/src/game/FragGame.cpp
--- scorchwentbonkers-1.3/src/game/FragGame.cpp~	2013-06-06 18:31:11.000000000 +0200
+++ scorchwentbonkers-1.3/src/game/FragGame.cpp	2016-02-21 11:10:53.824739449 +0100
@@ -1,4 +1,5 @@
 #include <cstdio>
+#include <cmath>
 #include <GL/gl.h>
 #include <alleggl.h>
 #include <allegro.h>
@@ -121,7 +122,7 @@ void FragGame::respawnPlayers()
 				xCoord = randomFloat(40.0, 760.0);
 				positionOK = true;
 				for (int j = 0; j < playerCount; j++)
-					if (abs(tanks[j]->getX() - xCoord) < 68.0)
+					if (fabs(tanks[j]->getX() - xCoord) < 68.0)
 						positionOK = false;	
 			} while (!positionOK);