diff --git a/doc/fixes3-7-0.txt b/doc/fixes3-7-0.txt
index 913448953..a53504e4d 100644
--- a/doc/fixes3-7-0.txt
+++ b/doc/fixes3-7-0.txt
@@ -1568,6 +1568,8 @@ throwing ammo without a launcher produces a message
 polymorphing into a large polyform unequips rather than destroying cloaks
 clarify in the #quit message that it doesn't save the game
 cursed potion of invisibility removes intrinsic invisibility
+fix bug which caused engulf damage from air elementals and fog clouds to
+        ignore damage reduction from armor class
 
 
 Fixes to 3.7.0-x General Problems Exposed Via git Repository
diff --git a/src/mhitu.c b/src/mhitu.c
index 8599136ed..89f6006dd 100644
--- a/src/mhitu.c
+++ b/src/mhitu.c
@@ -1535,8 +1535,15 @@ gulpmu(struct monst *mtmp, struct attack *mattk)
         break;
     }
 
-    if (physical_damage)
+    if (physical_damage) {
+        /* same damage reduction for AC as in hitmu */
+        if (u.uac < 0)
+            tmp -= rnd(-u.uac);
+        if (tmp < 0)
+            tmp = 1;
+
         tmp = Maybe_Half_Phys(tmp);
+    }
 
     gm.mswallower = mtmp; /* match gulpmm() */
     mdamageu(mtmp, tmp);