diff --git a/distribution/changelog.txt b/distribution/changelog.txt
index 9f37027f2a..31af3860f0 100644
--- a/distribution/changelog.txt
+++ b/distribution/changelog.txt
@@ -7,6 +7,7 @@
 - Improved: [#21227] Entrance style dropdown is now sorted alphabetically everywhere.
 - Change: [#21200] Raise maximum lift speeds of the Reverser Coaster, Side Friction Coaster, and Virginia Reel for RCT1 parity.
 - Change: [#21225] Raise maximum allowed misc entities to 1600.
+- Fix: [#19494] RCT1 fence gate walls not imported properly if they were placed on slopes.
 - Fix: [#20196] New scenarios start with an incorrect temperature.
 - Fix: [#20255] Images from the last hovered-over coaster in the object selection are not freed.
 - Fix: [#20616] Confirmation button in the track designer’s quit prompt has the wrong text.
diff --git a/src/openrct2/rct1/Tables.cpp b/src/openrct2/rct1/Tables.cpp
index bce1bc7bd0..94fe3d2b58 100644
--- a/src/openrct2/rct1/Tables.cpp
+++ b/src/openrct2/rct1/Tables.cpp
@@ -1191,6 +1191,70 @@ namespace RCT1
         return map[largeSceneryType];
     }
 
+    int32_t MapSlopedWall(uint8_t wallType)
+    {
+        static constexpr uint8_t map[] =
+        {
+            RCT1_WALL_TYPE_MESH_FENCE,                   // RCT1_WALL_TYPE_MESH_FENCE,
+            RCT1_WALL_TYPE_MESH_FENCE,                   // RCT1_WALL_TYPE_MESH_FENCE_WITH_GATE,
+            RCT1_WALL_TYPE_ROMAN,                        // RCT1_WALL_TYPE_ROMAN,
+            RCT1_WALL_TYPE_EGYPTIAN,                     // RCT1_WALL_TYPE_EGYPTIAN,
+            RCT1_WALL_TYPE_HEDGE,                        // RCT1_WALL_TYPE_HEDGE,
+            RCT1_WALL_TYPE_HEDGE,                        // RCT1_WALL_TYPE_HEDGE_WITH_GATE,
+            RCT1_WALL_TYPE_BLUE_PLAYING_CARDS,           // RCT1_WALL_TYPE_BLUE_PLAYING_CARDS,
+            RCT1_WALL_TYPE_RED_PLAYING_CARDS,            // RCT1_WALL_TYPE_RED_PLAYING_CARDS,
+            RCT1_WALL_TYPE_WHITE_RAILING,                // RCT1_WALL_TYPE_WHITE_RAILING,
+            RCT1_WALL_TYPE_WHITE_RAILING,                // RCT1_WALL_TYPE_WHITE_RAILING_WITH_GATE,
+            RCT1_WALL_TYPE_MARTIAN,                      // RCT1_WALL_TYPE_MARTIAN,
+            RCT1_WALL_TYPE_GLASS_SMOOTH,                 // RCT1_WALL_TYPE_GLASS_SMOOTH,
+            RCT1_WALL_TYPE_WOODEN_PANEL_FENCE,           // RCT1_WALL_TYPE_WOODEN_PANEL_FENCE,
+            RCT1_WALL_TYPE_WOODEN_PANEL_FENCE,           // RCT1_WALL_TYPE_WOODEN_PANEL_FENCE_WITH_GATE,
+            RCT1_WALL_TYPE_WOODEN_POST_FENCE,            // RCT1_WALL_TYPE_WOODEN_POST_FENCE,
+            RCT1_WALL_TYPE_RED_WOODEN_POST_FENCE,        // RCT1_WALL_TYPE_RED_WOODEN_POST_FENCE,
+            RCT1_WALL_TYPE_BARBED_WIRE,                  // RCT1_WALL_TYPE_BARBED_WIRE,
+            RCT1_WALL_TYPE_BARBED_WIRE,                  // RCT1_WALL_TYPE_BARBED_WIRE_WITH_GATE,
+            RCT1_WALL_TYPE_PRIMITIVE_TALL_WOOD_FENCE,    // RCT1_WALL_TYPE_PRIMITIVE_TALL_WOOD_FENCE,
+            RCT1_WALL_TYPE_PRIMITIVE_SHORT_WOOD_FENCE,   // RCT1_WALL_TYPE_PRIMITIVE_SHORT_WOOD_FENCE,
+            RCT1_WALL_TYPE_IRON_RAILING,                 // RCT1_WALL_TYPE_IRON_RAILING,
+            RCT1_WALL_TYPE_IRON_RAILING,                 // RCT1_WALL_TYPE_IRON_RAILING_WITH_GATE,
+            RCT1_WALL_TYPE_GLASS_PANELS,                 // RCT1_WALL_TYPE_GLASS_PANELS,
+            RCT1_WALL_TYPE_BONE_FENCE,                   // RCT1_WALL_TYPE_BONE_FENCE,
+            RCT1_WALL_TYPE_BRICK,                        // RCT1_WALL_TYPE_BRICK,
+            RCT1_WALL_TYPE_BRICK,                        // RCT1_WALL_TYPE_BRICK_WITH_GATE,
+            RCT1_WALL_TYPE_WHITE_WOODEN_PANEL_FENCE,     // RCT1_WALL_TYPE_WHITE_WOODEN_PANEL_FENCE,
+            RCT1_WALL_TYPE_RED_WOODEN_PANEL_FENCE,       // RCT1_WALL_TYPE_RED_WOODEN_PANEL_FENCE,
+            RCT1_WALL_TYPE_STONE,                        // RCT1_WALL_TYPE_STONE,
+            RCT1_WALL_TYPE_STONE,                        // RCT1_WALL_TYPE_STONE_WITH_GATE,
+            RCT1_WALL_TYPE_WOODEN_FENCE,                 // RCT1_WALL_TYPE_WOODEN_FENCE,
+            RCT1_WALL_TYPE_JUNGLE,                       // RCT1_WALL_TYPE_JUNGLE,
+            RCT1_WALL_TYPE_CONIFER_HEDGE,                // RCT1_WALL_TYPE_CONIFER_HEDGE,
+            RCT1_WALL_TYPE_CONIFER_HEDGE,                // RCT1_WALL_TYPE_CONIFER_HEDGE_WITH_GATE,
+            RCT1_WALL_TYPE_SMALL_BROWN_CASTLE,           // RCT1_WALL_TYPE_SMALL_BROWN_CASTLE,
+            RCT1_WALL_TYPE_SMALL_GREY_CASTLE,            // RCT1_WALL_TYPE_SMALL_GREY_CASTLE,
+            RCT1_WALL_TYPE_ROMAN_COLUMN,                 // RCT1_WALL_TYPE_ROMAN_COLUMN,
+            RCT1_WALL_TYPE_LARGE_BROWN_CASTLE,           // RCT1_WALL_TYPE_LARGE_BROWN_CASTLE,
+            RCT1_WALL_TYPE_LARGE_BROWN_CASTLE_CROSS,     // RCT1_WALL_TYPE_LARGE_BROWN_CASTLE_CROSS,
+            RCT1_WALL_TYPE_LARGE_BROWN_CASTLE_GATE,      // RCT1_WALL_TYPE_LARGE_BROWN_CASTLE_GATE,
+            RCT1_WALL_TYPE_LARGE_BROWN_CASTLE_WINDOW,    // RCT1_WALL_TYPE_LARGE_BROWN_CASTLE_WINDOW,
+            RCT1_WALL_TYPE_MEDIUM_BROWN_CASTLE,          // RCT1_WALL_TYPE_MEDIUM_BROWN_CASTLE,
+            RCT1_WALL_TYPE_LARGE_GREY_CASTLE,            // RCT1_WALL_TYPE_LARGE_GREY_CASTLE,
+            RCT1_WALL_TYPE_LARGE_GREY_CASTLE_CROSS,      // RCT1_WALL_TYPE_LARGE_GREY_CASTLE_CROSS,
+            RCT1_WALL_TYPE_LARGE_GREY_CASTLE_GATE,       // RCT1_WALL_TYPE_LARGE_GREY_CASTLE_GATE,
+            RCT1_WALL_TYPE_LARGE_GREY_CASTLE_WINDOW,     // RCT1_WALL_TYPE_LARGE_GREY_CASTLE_WINDOW,
+            RCT1_WALL_TYPE_MEDIUM_GREY_CASTLE,           // RCT1_WALL_TYPE_MEDIUM_GREY_CASTLE,
+            RCT1_WALL_TYPE_CREEPY,                       // RCT1_WALL_TYPE_CREEPY,
+            RCT1_WALL_TYPE_CREEPY_GATE,                  // RCT1_WALL_TYPE_CREEPY_GATE,
+            RCT1_WALL_TYPE_BARBED_WIRE_WITH_SNOW,        // RCT1_WALL_TYPE_BARBED_WIRE_WITH_SNOW,
+            RCT1_WALL_TYPE_WOODEN_PANEL_FENCE_WITH_SNOW, // RCT1_WALL_TYPE_WOODEN_PANEL_FENCE_WITH_SNOW,
+            RCT1_WALL_TYPE_WOODEN_POST_FENCE_WITH_SNOW,  // RCT1_WALL_TYPE_WOODEN_POST_FENCE_WITH_SNOW,
+        };
+
+        if (wallType < std::size(map))
+            return map[wallType];
+        
+        return -1;
+    }
+
     std::string_view GetWallObject(uint8_t wallType)
     {
         static constexpr const char * map[] =
diff --git a/src/openrct2/rct1/Tables.h b/src/openrct2/rct1/Tables.h
index 53caaab327..d8291093f4 100644
--- a/src/openrct2/rct1/Tables.h
+++ b/src/openrct2/rct1/Tables.h
@@ -38,6 +38,10 @@ namespace RCT1
     std::string_view GetVehicleObject(uint8_t vehicleType);
     std::string_view GetSmallSceneryObject(uint8_t smallSceneryType);
     std::string_view GetLargeSceneryObject(uint8_t largeSceneryType);
+    /**
+     * Most sloped gates look like their ungated counterpart. This function maps these gates.
+     */
+    int32_t MapSlopedWall(uint8_t wallType);
     std::string_view GetWallObject(uint8_t wallType);
     std::string_view GetPathSurfaceObject(uint8_t pathType);
     std::string_view GetPathAddtionObject(uint8_t pathAdditionType);
diff --git a/src/openrct2/rct12/RCT12.cpp b/src/openrct2/rct12/RCT12.cpp
index 1eee342ce3..8dcc235878 100644
--- a/src/openrct2/rct12/RCT12.cpp
+++ b/src/openrct2/rct12/RCT12.cpp
@@ -13,6 +13,7 @@
 #include "../localisation/Formatting.h"
 #include "../localisation/Localisation.h"
 #include "../object/ObjectList.h"
+#include "../rct1/Tables.h"
 #include "../rct2/RCT2.h"
 #include "../ride/Ride.h"
 #include "../ride/Track.h"
@@ -407,7 +408,14 @@ int32_t RCT12WallElement::GetRCT1WallType(int32_t edge) const
 
     if (typeB != 0x0F)
     {
-        return typeA | (typeB << 2);
+        int32_t index = typeA | (typeB << 2);
+
+        auto slope = GetRCT1Slope();
+        auto edgeSlope = GetWallSlopeFromEdgeSlope(slope, edge & 3);
+        if (edgeSlope & (EDGE_SLOPE_UPWARDS | EDGE_SLOPE_DOWNWARDS))
+            index = RCT1::MapSlopedWall(index);
+
+        return index;
     }
 
     return -1;