diff --git a/imgui.cpp b/imgui.cpp
index 211bd299..505fa0a8 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -213,6 +213,7 @@
  Here is a change-log of API breaking changes, if you are using one of the functions listed, expect to have to fix some code.
  Also read releases logs https://github.com/ocornut/imgui/releases for more details.
 
+ - 2017/11/27 (1.53) - renamed ImGuiTextBuffer::append() helper to appendf(), appendv() to appendfv(). If you copied the 'Log' demo in your code, it uses appendv() so that needs to be renamed.
  - 2017/11/18 (1.53) - Style, Begin: removed ImGuiWindowFlags_ShowBorders window flag. Borders are now fully set up in the ImGuiStyle structure (see e.g. style.FrameBorderSize, style.WindowBorderSize). Use ImGui::ShowStyleEditor() to look them up.
                        Please note that the style system will keep evolving (hopefully stabilizing in Q1 2018), and so custom styles will probably subtly break over time. It is recommended you use the StyleColorsClassic(), StyleColorsDark(), StyleColorsLight() functions.
  - 2017/11/18 (1.53) - Style: removed ImGuiCol_ComboBg in favor of combo boxes using ImGuiCol_PopupBg for consistency.
@@ -1643,7 +1644,7 @@ bool ImGuiTextFilter::PassFilter(const char* text, const char* text_end) const
 #endif
 
 // Helper: Text buffer for logging/accumulating text
-void ImGuiTextBuffer::appendv(const char* fmt, va_list args)
+void ImGuiTextBuffer::appendfv(const char* fmt, va_list args)
 {
     va_list args_copy;
     va_copy(args_copy, args);
@@ -1664,11 +1665,11 @@ void ImGuiTextBuffer::appendv(const char* fmt, va_list args)
     ImFormatStringV(&Buf[write_off - 1], len + 1, fmt, args_copy);
 }
 
-void ImGuiTextBuffer::append(const char* fmt, ...)
+void ImGuiTextBuffer::appendf(const char* fmt, ...)
 {
     va_list args;
     va_start(args, fmt);
-    appendv(fmt, args);
+    appendfv(fmt, args);
     va_end(args);
 }
 
@@ -2947,7 +2948,7 @@ void ImGui::LogText(const char* fmt, ...)
     }
     else
     {
-        g.LogClipboard->appendv(fmt, args);
+        g.LogClipboard->appendfv(fmt, args);
     }
     va_end(args);
 }
diff --git a/imgui.h b/imgui.h
index 4599d705..309730f2 100644
--- a/imgui.h
+++ b/imgui.h
@@ -1048,9 +1048,10 @@ struct ImGuiTextBuffer
     int                 size() const { return Buf.Size - 1; }
     bool                empty() { return Buf.Size <= 1; }
     void                clear() { Buf.clear(); Buf.push_back(0); }
+    void                reserve(int capacity) { Buf.reserve(capacity); }
     const char*         c_str() const { return Buf.Data; }
-    IMGUI_API void      append(const char* fmt, ...) IM_FMTARGS(2);
-    IMGUI_API void      appendv(const char* fmt, va_list args) IM_FMTLIST(2);
+    IMGUI_API void      appendf(const char* fmt, ...) IM_FMTARGS(2);
+    IMGUI_API void      appendfv(const char* fmt, va_list args) IM_FMTLIST(2);
 };
 
 // Helper: Simple Key->value storage
diff --git a/imgui_demo.cpp b/imgui_demo.cpp
index b1fefba4..30a4ce46 100644
--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@@ -2707,7 +2707,7 @@ struct ExampleAppLog
         int old_size = Buf.size();
         va_list args;
         va_start(args, fmt);
-        Buf.appendv(fmt, args);
+        Buf.appendfv(fmt, args);
         va_end(args);
         for (int new_size = Buf.size(); old_size < new_size; old_size++)
             if (Buf[old_size] == '\n')
@@ -2911,7 +2911,7 @@ static void ShowExampleAppLongText(bool* p_open)
     if (ImGui::Button("Add 1000 lines"))
     {
         for (int i = 0; i < 1000; i++)
-            log.append("%i The quick brown fox jumps over the lazy dog\n", lines+i);
+            log.appendf("%i The quick brown fox jumps over the lazy dog\n", lines+i);
         lines += 1000;
     }
     ImGui::BeginChild("Log");