diff --git a/pkg/dcimgui/build.zig b/pkg/dcimgui/build.zig
index 95c4af303..ae907dac0 100644
--- a/pkg/dcimgui/build.zig
+++ b/pkg/dcimgui/build.zig
@@ -49,6 +49,7 @@ pub fn build(b: *std.Build) !void {
     var flags: std.ArrayList([]const u8) = .empty;
     defer flags.deinit(b.allocator);
     try flags.appendSlice(b.allocator, &.{
+        "-DIMGUI_HAS_DOCK=1",
         "-DIMGUI_USE_WCHAR32=1",
         "-DIMGUI_DISABLE_OBSOLETE_FUNCTIONS=1",
     });
diff --git a/pkg/dcimgui/main.zig b/pkg/dcimgui/main.zig
index e709158f5..59bfca4f2 100644
--- a/pkg/dcimgui/main.zig
+++ b/pkg/dcimgui/main.zig
@@ -5,6 +5,8 @@ pub const c = @cImport({
     // during import time to get the right types. Without this
     // you get stack size mismatches on some structs.
     @cDefine("IMGUI_USE_WCHAR32", "1");
+
+    @cDefine("IMGUI_HAS_DOCK", "1");
     @cInclude("dcimgui.h");
 });
 
@@ -25,11 +27,39 @@ pub extern fn ImGui_ImplOSX_Init(*anyopaque) callconv(.c) bool;
 pub extern fn ImGui_ImplOSX_Shutdown() callconv(.c) void;
 pub extern fn ImGui_ImplOSX_NewFrame(*anyopaque) callconv(.c) void;
 
-// Internal API functions from dcimgui_internal.h
+// Internal API types and functions from dcimgui_internal.h
 // We declare these manually because the internal header contains bitfields
 // that Zig's cImport cannot translate.
+pub const ImGuiDockNodeFlagsPrivate = struct {
+    pub const DockSpace: c.ImGuiDockNodeFlags = 1 << 10;
+    pub const CentralNode: c.ImGuiDockNodeFlags = 1 << 11;
+    pub const NoTabBar: c.ImGuiDockNodeFlags = 1 << 12;
+    pub const HiddenTabBar: c.ImGuiDockNodeFlags = 1 << 13;
+    pub const NoWindowMenuButton: c.ImGuiDockNodeFlags = 1 << 14;
+    pub const NoCloseButton: c.ImGuiDockNodeFlags = 1 << 15;
+    pub const NoResizeX: c.ImGuiDockNodeFlags = 1 << 16;
+    pub const NoResizeY: c.ImGuiDockNodeFlags = 1 << 17;
+    pub const DockedWindowsInFocusRoute: c.ImGuiDockNodeFlags = 1 << 18;
+    pub const NoDockingSplitOther: c.ImGuiDockNodeFlags = 1 << 19;
+    pub const NoDockingOverMe: c.ImGuiDockNodeFlags = 1 << 20;
+    pub const NoDockingOverOther: c.ImGuiDockNodeFlags = 1 << 21;
+    pub const NoDockingOverEmpty: c.ImGuiDockNodeFlags = 1 << 22;
+};
 pub extern fn ImGui_DockBuilderDockWindow(window_name: [*:0]const u8, node_id: c.ImGuiID) callconv(.c) void;
+pub extern fn ImGui_DockBuilderGetNode(node_id: c.ImGuiID) callconv(.c) ?*anyopaque;
+pub extern fn ImGui_DockBuilderGetCentralNode(node_id: c.ImGuiID) callconv(.c) ?*anyopaque;
+pub extern fn ImGui_DockBuilderAddNode() callconv(.c) c.ImGuiID;
+pub extern fn ImGui_DockBuilderAddNodeEx(node_id: c.ImGuiID, flags: c.ImGuiDockNodeFlags) callconv(.c) c.ImGuiID;
+pub extern fn ImGui_DockBuilderRemoveNode(node_id: c.ImGuiID) callconv(.c) void;
+pub extern fn ImGui_DockBuilderRemoveNodeDockedWindows(node_id: c.ImGuiID) callconv(.c) void;
+pub extern fn ImGui_DockBuilderRemoveNodeDockedWindowsEx(node_id: c.ImGuiID, clear_settings_refs: bool) callconv(.c) void;
+pub extern fn ImGui_DockBuilderRemoveNodeChildNodes(node_id: c.ImGuiID) callconv(.c) void;
+pub extern fn ImGui_DockBuilderSetNodePos(node_id: c.ImGuiID, pos: c.ImVec2) callconv(.c) void;
+pub extern fn ImGui_DockBuilderSetNodeSize(node_id: c.ImGuiID, size: c.ImVec2) callconv(.c) void;
 pub extern fn ImGui_DockBuilderSplitNode(node_id: c.ImGuiID, split_dir: c.ImGuiDir, size_ratio_for_node_at_dir: f32, out_id_at_dir: *c.ImGuiID, out_id_at_opposite_dir: *c.ImGuiID) callconv(.c) c.ImGuiID;
+pub extern fn ImGui_DockBuilderCopyDockSpace(src_dockspace_id: c.ImGuiID, dst_dockspace_id: c.ImGuiID, in_window_remap_pairs: *c.ImVector_const_charPtr) callconv(.c) void;
+pub extern fn ImGui_DockBuilderCopyNode(src_node_id: c.ImGuiID, dst_node_id: c.ImGuiID, out_node_remap_pairs: *c.ImVector_ImGuiID) callconv(.c) void;
+pub extern fn ImGui_DockBuilderCopyWindowSettings(src_name: [*:0]const u8, dst_name: [*:0]const u8) callconv(.c) void;
 pub extern fn ImGui_DockBuilderFinish(node_id: c.ImGuiID) callconv(.c) void;
 
 // Extension functions from ext.cpp