diff --git a/legacy/ecore/src/lib/ecore_x/Ecore_X.h b/legacy/ecore/src/lib/ecore_x/Ecore_X.h
index e3ecca6ca8..9c864f4c65 100644
--- a/legacy/ecore/src/lib/ecore_x/Ecore_X.h
+++ b/legacy/ecore/src/lib/ecore_x/Ecore_X.h
@@ -1386,6 +1386,8 @@ EAPI int   ecore_x_icccm_size_pos_hints_get(Ecore_X_Window win,
 					    double *max_aspect);
 EAPI void  ecore_x_icccm_title_set(Ecore_X_Window win, const char *t);
 EAPI char *ecore_x_icccm_title_get(Ecore_X_Window win);
+EAPI void  ecore_x_icccom_protocol_atoms_set(Ecore_X_Window win,
+                                             Ecore_X_Atom *protos, int num);
 EAPI void  ecore_x_icccm_protocol_set(Ecore_X_Window win,
 				      Ecore_X_WM_Protocol protocol,
 				      int on);