diff --git a/src/sp_lev.c b/src/sp_lev.c
index 80b8e96c6..363e4018d 100644
--- a/src/sp_lev.c
+++ b/src/sp_lev.c
@@ -3111,7 +3111,7 @@ get_table_montype(lua_State *L, int *mgender)
     int ret = NON_PM;
 
     if (s) {
-        ret = find_montype(L, s, mgender);
+        ret = find_montype(L, utf8toic(s), mgender);
         Free(s);
         if (ret == NON_PM)
             nhl_error(L, "Unknown monster id");
@@ -3191,7 +3191,7 @@ lspo_monster(lua_State *L)
             tmpmons.id = NON_PM;
         } else {
             tmpmons.class = -1;
-            tmpmons.id = find_montype(L, paramstr, &mgend);
+            tmpmons.id = find_montype(L, utf8toic(paramstr), &mgend);
             tmpmons.female = (mgend == FEMALE) ? FEMALE
                                 : (mgend == MALE) ? MALE : rn2(2);
         }
@@ -3206,7 +3206,7 @@ lspo_monster(lua_State *L)
             tmpmons.id = NON_PM;
         } else {
             tmpmons.class = -1;
-            tmpmons.id = find_montype(L, paramstr, &mgend);
+            tmpmons.id = find_montype(L, utf8toic(paramstr), &mgend);
             tmpmons.female = (mgend == FEMALE) ? FEMALE
                                 : (mgend == MALE) ? MALE : rn2(2);
         }
@@ -3222,7 +3222,7 @@ lspo_monster(lua_State *L)
             tmpmons.id = NON_PM;
         } else {
             tmpmons.class = -1;
-            tmpmons.id = find_montype(L, paramstr, &mgend);
+            tmpmons.id = find_montype(L, utf8toic(paramstr), &mgend);
             tmpmons.female = (mgend == FEMALE) ? FEMALE
                                 : (mgend == MALE) ? MALE : rn2(2);
         }
@@ -3461,7 +3461,7 @@ static int
 get_table_objtype(lua_State *L)
 {
     char *s = get_table_str_opt(L, "id", NULL);
-    int ret = find_objtype(L, s);
+    int ret = find_objtype(L, utf8toic(s));
 
     Free(s);
     return ret;
@@ -3519,7 +3519,7 @@ lspo_object(lua_State *L)
             tmpobj.id = STRANGE_OBJECT;
         } else {
             tmpobj.class = -1;
-            tmpobj.id = find_objtype(L, paramstr);
+            tmpobj.id = find_objtype(L, utf8toic(paramstr));
         }
     } else if (argc == 2 && lua_type(L, 1) == LUA_TSTRING
                && lua_type(L, 2) == LUA_TTABLE) {
@@ -3532,7 +3532,7 @@ lspo_object(lua_State *L)
             tmpobj.id = STRANGE_OBJECT;
         } else {
             tmpobj.class = -1;
-            tmpobj.id = find_objtype(L, paramstr);
+            tmpobj.id = find_objtype(L, utf8toic(paramstr));
         }
     } else if (argc == 3 && lua_type(L, 2) == LUA_TNUMBER
                && lua_type(L, 3) == LUA_TNUMBER) {
@@ -3546,7 +3546,7 @@ lspo_object(lua_State *L)
             tmpobj.id = STRANGE_OBJECT;
         } else {
             tmpobj.class = -1;
-            tmpobj.id = find_objtype(L, paramstr);
+            tmpobj.id = find_objtype(L, utf8toic(paramstr));
         }
     } else {
         lcheck_param_table(L);