diff --git a/cfg/std.cfg b/cfg/std.cfg
index 83ab7f8e7..23616f160 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -6666,9 +6666,8 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
       <not-uninit/>
     </arg>
   </function>
-  <function name="std::list::find,std::map::find,std::set::find,std::vector::find,std::unordered_map::find,std::unordered_multimap::find,std::unordered_set::find,std::unordered_multiset::find,std::multiset::find,std::multimap::find">
+  <function name="std::map::find,std::set::find,std::unordered_map::find,std::unordered_multimap::find,std::unordered_set::find,std::unordered_multiset::find,std::multiset::find,std::multimap::find">
     <use-retval/>
-    <const/>
     <returnValue type="iterator"/>
     <noreturn>false</noreturn>
     <arg nr="1">
diff --git a/lib/astutils.cpp b/lib/astutils.cpp
index d1e92ed93..f417ad704 100644
--- a/lib/astutils.cpp
+++ b/lib/astutils.cpp
@@ -2582,6 +2582,7 @@ bool isVariableChanged(const Token *tok, int indirect, const Settings *settings,
                           Library::Container::Action::CHANGE_CONTENT,
                           Library::Container::Action::CHANGE_INTERNAL,
                           Library::Container::Action::CLEAR,
+                          Library::Container::Action::FIND,
                           Library::Container::Action::PUSH,
                           Library::Container::Action::POP,
                           Library::Container::Action::RESIZE},
diff --git a/test/cfg/std.cpp b/test/cfg/std.cpp
index 4952c79d8..81e5ba877 100644
--- a/test/cfg/std.cpp
+++ b/test/cfg/std.cpp
@@ -880,6 +880,14 @@ void std_unordered_map_emplace_unnitvar(std::unordered_set<int>& u)
     u.emplace(i);
 }
 
+int std_map_find_constref(std::map<int, int>& m) // #11857
+{
+    std::map<int, int>& r = m;
+    std::map<int, int>::iterator it = r.find(42);
+    int* p = &it->second;
+    return ++*p;
+}
+
 void valid_code()
 {
     std::vector<int> vecInt{0, 1, 2};