diff --git a/src/condition.cpp b/src/condition.cpp
index 8c55915551b46..8985f307fac96 100644
--- a/src/condition.cpp
+++ b/src/condition.cpp
@@ -1586,6 +1586,13 @@ conditional_t::func f_tile_is_outside( const JsonObject &jo, std::string_view me
     };
 }
 
+conditional_t::func f_is_wall_adjacent( bool is_npc )
+{
+    return [is_npc]( const_dialogue const & d ) {
+        return d.const_actor( is_npc )->is_wall_adjacent();
+    };
+}
+
 conditional_t::func f_is_underwater( bool is_npc )
 {
     const map &here = get_map();
diff --git a/src/npctalk.cpp b/src/npctalk.cpp
index 6bd3eae0a1887..a6338dd64e469 100644
--- a/src/npctalk.cpp
+++ b/src/npctalk.cpp
@@ -5224,6 +5224,7 @@ talk_effect_fun_t::func f_message( const JsonObject &jo, std::string_view member
     const bool same_snippet = jo.get_bool( "same_snippet", false );
     const bool outdoor_only = jo.get_bool( "outdoor_only", false );
     const bool store_in_lore = jo.get_bool( "store_in_lore", false );
+    const bool is_wall_adjacent = jo.get_bool( "is_wall_adjacent", false );
     const bool sound = jo.get_bool( "sound", false );
     const bool popup_msg = jo.get_bool( "popup", false );
     const bool popup_w_interrupt_query_msg = jo.get_bool( "popup_w_interrupt_query", false );