diff --git a/doc/Guidebook.txt b/doc/Guidebook.txt
index 4fcee4240..64c6fdfe5 100644
--- a/doc/Guidebook.txt
+++ b/doc/Guidebook.txt
@@ -5983,15 +5983,15 @@
           D  S_dragon               (dragon)
           ;  S_eel                  (sea monster)
           E  S_elemental            (elemental)
-          /  S_explode1             (explosion top left)
-          -  S_explode2             (explosion top center)
-          \  S_explode3             (explosion top right)
-          |  S_explode4             (explosion middle left)
-             S_explode5             (explosion middle center)
-          |  S_explode6             (explosion middle right)
-          \  S_explode7             (explosion bottom left)
-          -  S_explode8             (explosion bottom center)
-          /  S_explode9             (explosion bottom right)
+          /  S_expl_tl              (explosion top left)
+          -  S_expl_tc              (explosion top center)
+          \  S_expl_tr              (explosion top right)
+          |  S_expl_ml              (explosion middle left)
+             S_expl_mc              (explosion middle center)
+          |  S_expl_mr              (explosion middle right)
+          \  S_expl_bl              (explosion bottom left)
+          -  S_expl_bc              (explosion bottom center)
+          /  S_expl_br              (explosion bottom right)
           e  S_eye                  (eye or sphere)
           ^  S_falling_rock_trap    (falling rock trap)
           f  S_feline               (cat or other feline)