diff --git a/imgui.cpp b/imgui.cpp
index ea7d4e52b..b4b52263d 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -210,7 +210,7 @@
  - 2017/08/20 (1.51) - added PushStyleColor(ImGuiCol idx, ImU32 col) overload, which _might_ cause an "ambiguous call" compilation error if you are using ImColor() with implicit cast. Cast to ImU32 or ImVec4 explicily to fix.
  - 2017/08/15 (1.51) - marked the weird IMGUI_ONCE_UPON_A_FRAME helper macro as obsolete. prefer using the more explicit ImGuiOnceUponAFrame.
  - 2017/08/15 (1.51) - changed parameter order for BeginPopupContextWindow() from (const char*,int buttons,bool also_over_items) to (const char*,int buttons,bool also_over_items). Note that most calls relied on default parameters completely.
- - 2017/08/13 (1.51) - renamed ImGuiCol_Columns_*** to ImGuiCol_Separator_***
+ - 2017/08/13 (1.51) - renamed ImGuiCol_Columns*** to ImGuiCol_Separator***. Kept redirection enums (will obsolete).
  - 2017/08/11 (1.51) - renamed ImGuiSetCond_*** types and flags to ImGuiCond_***. Kept redirection enums (will obsolete).
  - 2017/08/09 (1.51) - removed ValueColor() helpers, they are equivalent to calling Text(label) + SameLine() + ColorButton().
  - 2017/08/08 (1.51) - removed ColorEditMode() and ImGuiColorEditMode in favor of ImGuiColorEditFlags and parameters to the various Color*() functions. The SetColorEditOptions() allows to initialize default but the user can still change them with right-click context menu.
diff --git a/imgui.h b/imgui.h
index d5be3a7b2..84bb32e48 100644
--- a/imgui.h
+++ b/imgui.h
@@ -645,6 +645,11 @@ enum ImGuiCol_
     ImGuiCol_TextSelectedBg,
     ImGuiCol_ModalWindowDarkening,  // darken entire screen when a modal window is active
     ImGuiCol_COUNT
+
+    // Obsolete names (will be removed)
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    , ImGuiCol_Column = ImGuiCol_Separator, ImGuiCol_ColumnHovered = ImGuiCol_SeparatorHovered, ImGuiCol_ColumnActive = ImGuiCol_SeparatorActive
+#endif
 };
 
 // Enumeration for PushStyleVar() / PopStyleVar() to temporarily modify the ImGuiStyle structure.
@@ -721,7 +726,7 @@ enum ImGuiCond_
     ImGuiCond_FirstUseEver  = 1 << 2, // Set the variable if the window has no saved data (if doesn't exist in the .ini file)
     ImGuiCond_Appearing     = 1 << 3  // Set the variable if the window is appearing after being hidden/inactive (or the first time)
 
-// Obsolete names (will be obsolete)
+    // Obsolete names (will be removed)
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
     , ImGuiSetCond_Always = ImGuiCond_Always, ImGuiSetCond_Once = ImGuiCond_Once, ImGuiSetCond_FirstUseEver = ImGuiCond_FirstUseEver, ImGuiSetCond_Appearing = ImGuiCond_Appearing
 #endif