diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index a1423627..c0281c1f 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -39,6 +39,7 @@ Breaking Changes:
  - Changed ImGui::GetTime() return value from float to double to avoid accumulating floating point imprecisions over time.
  - Removed per-window ImGuiWindowFlags_ResizeFromAnySide beta flag in favor `io.ConfigResizeWindowsFromEdges=true` to enable the feature globally. (#1495)
    The feature is not currently enabled by default because it is not satisfying enough.
+ - InputText: Removed ImGuiTextEditCallbackData::ReadOnly since it is a duplication of (ImGuiTextEditCallbackData::Flags & ImGuiInputTextFlags_ReadOnly).
  - Renamed io.OptCursorBlink to io.ConfigCursorBlink, io.OptMacOSXBehaviors to io.ConfigMacOSXBehaviors for consistency. (#1427, #473)
 
 Other Changes:
diff --git a/imgui.cpp b/imgui.cpp
index c71b21b4..a15a0648 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -307,6 +307,7 @@
  When you are not sure about a old symbol or function name, try using the Search/Find function of your IDE to look for comments or references in all imgui files.
  You can read releases logs https://github.com/ocornut/imgui/releases for more details.
 
+ - 2018/08/21 (1.63) - removed ImGuiTextEditCallbackData::ReadOnly since it is a duplication of (ImGuiTextEditCallbackData::Flags & ImGuiInputTextFlags_ReadOnly).
  - 2018/08/01 (1.63) - removed per-window ImGuiWindowFlags_ResizeFromAnySide beta flag in favor of a global io.ConfigResizeWindowsFromEdges to enable the feature.
  - 2018/08/01 (1.63) - renamed io.OptCursorBlink to io.ConfigCursorBlink, io.OptMacOSXBehaviors to ConfigMacOSXBehaviors for consistency.
  - 2018/07/22 (1.63) - changed ImGui::GetTime() return value from float to double to avoid accumulating floating point imprecisions over time.
@@ -11066,7 +11067,6 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
                     callback_data.EventFlag = event_flag;
                     callback_data.Flags = flags;
                     callback_data.UserData = user_data;
-                    callback_data.ReadOnly = !is_editable;
 
                     callback_data.EventKey = event_key;
                     callback_data.Buf = edit_state.TempTextBuffer.Data;
diff --git a/imgui.h b/imgui.h
index a4644516..20ec3c10 100644
--- a/imgui.h
+++ b/imgui.h
@@ -1117,12 +1117,12 @@ struct ImGuiIO
     void*       ImeWindowHandle;            // (Windows) Set this to your HWND to get automatic IME cursor positioning.
 
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
-    // [OBSOLETE] Rendering function, will be automatically called in Render(). Please call your rendering function yourself now!
+    // [OBSOLETE since 1.60+] Rendering function, will be automatically called in Render(). Please call your rendering function yourself now!
     // You can obtain the ImDrawData* by calling ImGui::GetDrawData() after Render(). See example applications if you are unsure of how to implement this.
     void        (*RenderDrawListsFn)(ImDrawData* data);
 #else
     // This is only here to keep ImGuiIO the same size, so that IMGUI_DISABLE_OBSOLETE_FUNCTIONS can exceptionally be used outside of imconfig.h.
-    void*       RenderDrawListsFnDummy;
+    void*       RenderDrawListsFnUnused;
 #endif
 
     //------------------------------------------------------------------
@@ -1420,7 +1420,6 @@ struct ImGuiTextEditCallbackData
     ImGuiInputTextFlags EventFlag;      // One of ImGuiInputTextFlags_Callback* // Read-only
     ImGuiInputTextFlags Flags;          // What user passed to InputText()      // Read-only
     void*               UserData;       // What user passed to InputText()      // Read-only
-    bool                ReadOnly;       // Read-only mode                       // Read-only
 
     // CharFilter event:
     ImWchar             EventChar;      // Character input                      // Read-write (replace character or set to zero)
@@ -1437,9 +1436,9 @@ struct ImGuiTextEditCallbackData
     int                 SelectionEnd;   //                                      // Read-write
 
     // NB: Helper functions for text manipulation. Calling those function loses selection.
-    IMGUI_API void    DeleteChars(int pos, int bytes_count);
-    IMGUI_API void    InsertChars(int pos, const char* text, const char* text_end = NULL);
-    bool              HasSelection() const { return SelectionStart != SelectionEnd; }
+    IMGUI_API void      DeleteChars(int pos, int bytes_count);
+    IMGUI_API void      InsertChars(int pos, const char* text, const char* text_end = NULL);
+    bool                HasSelection() const { return SelectionStart != SelectionEnd; }
 };
 
 // Resizing callback data to apply custom constraint. As enabled by SetNextWindowSizeConstraints(). Callback is called during the next Begin().