X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fprops%2Fcondition.hxx;h=c70e86d74d77ea356f041fb2b430df61d379d0ac;hb=2e93b06ac0874f1cee1e22dc30777a0066ef289b;hp=5f06a5e5b2a5ce670478f55c13193a1fbc330c65;hpb=a3bc2eb836466a141ab48efa05b2c3d34c4d383b;p=simgear.git

diff --git a/simgear/props/condition.hxx b/simgear/props/condition.hxx
index 5f06a5e5..c70e86d7 100644
--- a/simgear/props/condition.hxx
+++ b/simgear/props/condition.hxx
@@ -146,7 +146,7 @@ private:
  * invoke the test() method whenever it needs to decide whether to
  * active itself, draw itself, and so on.
  */
-class SGConditional
+class SGConditional : public SGReferenced
 {
 public:
   SGConditional ();