X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fsound%2Fsoundmgr_openal.cxx;h=2d321bdf62fcd308bcd41ee27563208f429a39b0;hb=709a166bd6b9d15f42100e5bfea52e5e6c0e8c0e;hp=e9e2dfbcdac0e757d701591303e8259ca5f8de45;hpb=055e969e7a9b19792945d12f8850ba4b55cba85d;p=simgear.git

diff --git a/simgear/sound/soundmgr_openal.cxx b/simgear/sound/soundmgr_openal.cxx
index e9e2dfbc..2d321bdf 100644
--- a/simgear/sound/soundmgr_openal.cxx
+++ b/simgear/sound/soundmgr_openal.cxx
@@ -47,7 +47,11 @@ inline int (isnan)(double r) { return isnan(r); }
 #endif
 
 #if defined (__FreeBSD__)
-inline int isnan(double r) { return !(r <= 0 || r >= 0); }
+#  if __FreeBSD_version < 500000
+     extern "C" {
+       inline int isnan(double r) { return !(r <= 0 || r >= 0); }
+     }
+#  endif
 #endif
 
 #include STL_IOSTREAM