diff --git a/src/openrct2-ui/interface/ViewportInteraction.cpp b/src/openrct2-ui/interface/ViewportInteraction.cpp
index 736c611b21..277ece1273 100644
--- a/src/openrct2-ui/interface/ViewportInteraction.cpp
+++ b/src/openrct2-ui/interface/ViewportInteraction.cpp
@@ -327,15 +327,17 @@ int32_t viewport_interaction_get_item_right(const ScreenCoordsXY& screenCoords,
             if (sceneryEntry->wall.scrolling_mode != SCROLLING_MODE_NONE)
             {
                 auto banner = tileElement->AsWall()->GetBanner();
-
-                size_t argPos = 0;
-                set_map_tooltip_format_arg(argPos, rct_string_id, STR_MAP_TOOLTIP_BANNER_STRINGID_STRINGID);
-                argPos += sizeof(rct_string_id);
-                argPos += banner->FormatTextTo(gMapTooltipFormatArgs + argPos);
-                set_map_tooltip_format_arg(argPos, rct_string_id, STR_MAP_TOOLTIP_STRINGID_CLICK_TO_MODIFY);
-                argPos += sizeof(rct_string_id);
-                set_map_tooltip_format_arg(argPos, rct_string_id, sceneryEntry->name);
-                return info->type;
+                if (banner != nullptr)
+                {
+                    size_t argPos = 0;
+                    set_map_tooltip_format_arg(argPos, rct_string_id, STR_MAP_TOOLTIP_BANNER_STRINGID_STRINGID);
+                    argPos += sizeof(rct_string_id);
+                    argPos += banner->FormatTextTo(gMapTooltipFormatArgs + argPos);
+                    set_map_tooltip_format_arg(argPos, rct_string_id, STR_MAP_TOOLTIP_STRINGID_CLICK_TO_MODIFY);
+                    argPos += sizeof(rct_string_id);
+                    set_map_tooltip_format_arg(argPos, rct_string_id, sceneryEntry->name);
+                    return info->type;
+                }
             }
             break;
 
@@ -344,15 +346,17 @@ int32_t viewport_interaction_get_item_right(const ScreenCoordsXY& screenCoords,
             if (sceneryEntry->large_scenery.scrolling_mode != SCROLLING_MODE_NONE)
             {
                 auto banner = tileElement->AsLargeScenery()->GetBanner();
-
-                size_t argPos = 0;
-                set_map_tooltip_format_arg(argPos, rct_string_id, STR_MAP_TOOLTIP_BANNER_STRINGID_STRINGID);
-                argPos += sizeof(rct_string_id);
-                argPos += banner->FormatTextTo(gMapTooltipFormatArgs + argPos);
-                set_map_tooltip_format_arg(argPos, rct_string_id, STR_MAP_TOOLTIP_STRINGID_CLICK_TO_MODIFY);
-                argPos += sizeof(rct_string_id);
-                set_map_tooltip_format_arg(argPos, rct_string_id, sceneryEntry->name);
-                return info->type;
+                if (banner != nullptr)
+                {
+                    size_t argPos = 0;
+                    set_map_tooltip_format_arg(argPos, rct_string_id, STR_MAP_TOOLTIP_BANNER_STRINGID_STRINGID);
+                    argPos += sizeof(rct_string_id);
+                    argPos += banner->FormatTextTo(gMapTooltipFormatArgs + argPos);
+                    set_map_tooltip_format_arg(argPos, rct_string_id, STR_MAP_TOOLTIP_STRINGID_CLICK_TO_MODIFY);
+                    argPos += sizeof(rct_string_id);
+                    set_map_tooltip_format_arg(argPos, rct_string_id, sceneryEntry->name);
+                    return info->type;
+                }
             }
             break;
 
diff --git a/src/openrct2-ui/windows/Sign.cpp b/src/openrct2-ui/windows/Sign.cpp
index 42d0eb967b..aee4ce143a 100644
--- a/src/openrct2-ui/windows/Sign.cpp
+++ b/src/openrct2-ui/windows/Sign.cpp
@@ -156,8 +156,10 @@ rct_window* window_sign_open(rct_windownumber number)
     window_init_scroll_widgets(w);
 
     auto banner = GetBanner(w->number);
-    auto signViewPos = banner->position.ToCoordsXY().ToTileCentre();
+    if (banner == nullptr)
+        return nullptr;
 
+    auto signViewPos = banner->position.ToCoordsXY().ToTileCentre();
     TileElement* tile_element = map_get_first_element_at(signViewPos);
     if (tile_element == nullptr)
         return nullptr;