diff --git a/src/lib/subs/nuke.c b/src/lib/subs/nuke.c
index fe71e7ba..363621f3 100644
--- a/src/lib/subs/nuke.c
+++ b/src/lib/subs/nuke.c
@@ -89,6 +89,9 @@ nuk_prewrite(int n, void *ptr)
     }
 
     getnuke(n, &nuke);
+    if (nuke.nuk_plane != np->nuk_plane)
+	logerror("phantom nuke debug: nuk#%d plane %d->%d",
+		 np->nuk_uid, nuke.nuk_plane, np->nuk_plane);
 
     return 1;
 }
diff --git a/src/lib/subs/plane.c b/src/lib/subs/plane.c
index aaaaf845..17554dd1 100644
--- a/src/lib/subs/plane.c
+++ b/src/lib/subs/plane.c
@@ -132,6 +132,9 @@ pln_prewrite(int n, void *ptr)
 	}
     }
     getplane(n, &plane);
+    if (plane.pln_nuketype != pp->pln_nuketype)
+	logerror("phantom nuke debug: pln#%d nuketype %d->%d",
+		 pp->pln_uid, plane.pln_nuketype, pp->pln_nuketype);
 
     return 1;
 }