diff --git a/code/parse/lua.cpp b/code/parse/lua.cpp
index 77444b882c..0083323dd8 100644
--- a/code/parse/lua.cpp
+++ b/code/parse/lua.cpp
@@ -2736,7 +2736,7 @@ ADE_VIRTVAR(RotationalVelocityDamping, l_Physics, "number", "Rotational damping,
 	return ade_set_args(L, "f", pih->pi->rotdamp);
 }
 
-ADE_VIRTVAR(RotationalVelocityDesired, l_Physics, "lvector", "Desired rotational velocity", "number", "Desired rotational velocity, or 0 if handle is invalid")
+ADE_VIRTVAR(RotationalVelocityDesired, l_Physics, "vector", "Desired rotational velocity", "vector", "Desired rotational velocity, or null vector if handle is invalid")
 {
 	physics_info_h *pih;
 	vec3d *v3=NULL;