diff --git a/Thing.h b/Thing.h
index f57f099..5fb888e 100644
--- a/Thing.h
+++ b/Thing.h
@@ -115,6 +115,7 @@ class Thing {
   Thing* parent = nullptr;
   Thing** children = nullptr;
 
+ public:
   AngleAxis16 angularVelocity = AngleAxis16::zero;
   Spherical16 linearVelocity = Spherical16::zero;
 };