diff --git a/imgui.cpp b/imgui.cpp
index 93acf44d..2e1a611a 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -329,9 +329,9 @@ ImGuiIO::ImGuiIO()
     MousePosPrev = ImVec2(-1,-1);
     MouseDoubleClickTime = 0.30f;
     MouseDoubleClickMaxDist = 6.0f;
+    UserData = NULL;
 
     // User functions
-    UserData = NULL;
     RenderDrawListsFn = NULL;
     MemAllocFn = malloc;
     MemReallocFn = realloc;
diff --git a/imgui.h b/imgui.h
index 65358aa0..68eecfd1 100644
--- a/imgui.h
+++ b/imgui.h
@@ -423,13 +423,12 @@ struct ImGuiIO
     ImWchar     FontFallbackGlyph;          // = '?'                    // Replacement glyph is one isn't found.
     float       PixelCenterOffset;          // = 0.0f                   // Try to set to 0.5f or 0.375f if rendering is blurry
 
+    void*       UserData;                   // = NULL                   // Store your own data for retrieval by callbacks.
+
     //------------------------------------------------------------------
     // User Functions
     //------------------------------------------------------------------
 
-    // Store your own data for retrieval by callbacks.
-    void*       UserData;                   // = NULL
-
     // REQUIRED: rendering function. 
     // See example code if you are unsure of how to implement this.
     void        (*RenderDrawListsFn)(ImDrawList** const draw_lists, int count);