diff --git a/src/common/kernel/eressea.c b/src/common/kernel/eressea.c
index de8290e18..83abff2ba 100644
--- a/src/common/kernel/eressea.c
+++ b/src/common/kernel/eressea.c
@@ -3035,6 +3035,7 @@ attrib_init(void)
 #endif
 	at_register(&at_laen); /* required for old datafiles */
 	at_register(&at_xontormiaexpress); /* required for old datafiles */
+	at_register(&at_wdwpyramid);
 }
 
 void
diff --git a/src/common/kernel/spell.h b/src/common/kernel/spell.h
index 98f0d9320..e26415af8 100644
--- a/src/common/kernel/spell.h
+++ b/src/common/kernel/spell.h
@@ -283,6 +283,7 @@ typedef struct wall_data {
 
 extern struct attrib_type at_cursewall;
 extern struct attrib_type at_unitdissolve;
+extern struct attrib_type at_wdwpyramid;
 extern struct spell spelldaten[];
 
 #ifdef __cplusplus