diff --git a/rotators/prosistel/prosistel.h b/rotators/prosistel/prosistel.h
index ee7b3594b..2b1b90c89 100644
--- a/rotators/prosistel/prosistel.h
+++ b/rotators/prosistel/prosistel.h
@@ -25,5 +25,6 @@
 extern const struct rot_caps prosistel_d_az_rot_caps;
 extern const struct rot_caps prosistel_d_el_rot_caps;
 extern const struct rot_caps prosistel_combi_track_azel_rot_caps;
+extern const struct rot_caps prosistel_d_el_cboxaz_rot_caps;
 
 #endif /* _ROT_PROSISTEL_H */