--- a/APSCpp/sphereAlign.h
+++ b/APSCpp/sphereAlign.h
@@ -181,6 +181,8 @@
   fmt is a Panotools format code
   flmm should be 0 for ideal projections, else > 0
 */
+// delete
+void CamLens_delete( pCamLens self );
 // create empty
 pCamLens CamLens_new0();
 // create with minimal info