diff --git a/mysql-test/r/func_in.result b/mysql-test/r/func_in.result
index b88e5a66f96..cbcd3bfbe41 100644
--- a/mysql-test/r/func_in.result
+++ b/mysql-test/r/func_in.result
@@ -342,6 +342,10 @@ select some_id from t1 where some_id not in(-4,-1,3423534,2342342);
 some_id
 1
 2
+select some_id from t1 where some_id not in('-1', '0');
+some_id
+1
+2
 drop table t1;
 create table t1(f1 char(1));
 insert into t1 values ('a'),('b'),('1');
diff --git a/mysql-test/t/func_in.test b/mysql-test/t/func_in.test
index 906747c2f78..9c924a930f3 100644
--- a/mysql-test/t/func_in.test
+++ b/mysql-test/t/func_in.test
@@ -231,6 +231,13 @@ insert into t1 values (1),(2);
 select some_id from t1 where some_id not in(2,-1);
 select some_id from t1 where some_id not in(-4,-1,-4);
 select some_id from t1 where some_id not in(-4,-1,3423534,2342342);
+
+#
+# BUG#24261: crash when WHERE contains NOT IN ('<negative value>') for unsigned column type
+#
+
+select some_id from t1 where some_id not in('-1', '0');
+
 drop table t1;
 
 #
diff --git a/sql/opt_range.cc b/sql/opt_range.cc
index 79b3e023a5f..001f1faf9b0 100644
--- a/sql/opt_range.cc
+++ b/sql/opt_range.cc
@@ -5012,7 +5012,8 @@ static SEL_TREE *get_func_mm_tree(RANGE_OPT_PARAM *param, Item_func *cond_func,
             for (uint idx= 0; idx < param->keys; idx++)
             {
               SEL_ARG *new_interval, *last_val;
-              if (((new_interval= tree2->keys[idx])) && 
+              if (((new_interval= tree2->keys[idx])) &&
+                  (tree->keys[idx]) &&
                   ((last_val= tree->keys[idx]->last())))
               {
                 new_interval->min_value= last_val->max_value;