diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index 9456cf1..5eedb94 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -12,6 +12,8 @@
   `sys::igIsWindowFocused(ImGuiFocusedFlags::RootAndChildWindows)`.
   - Obsolete `sys::igIsRootWindowOrAnyChildHovered()` in favor of using
   `sys::igIsWindowHovered(ImGuiHoveredFlags::RootAndChildWindows)`.
+  - Obsolete `sys::SetNextWindowContentWidth()` in favor of using
+  `sys::igSetNextWindowContentSize()`.
 
 
 ## [0.0.18] - 2017-12-23
diff --git a/imgui-sys/src/lib.rs b/imgui-sys/src/lib.rs
index 030dc01..0997d2f 100644
--- a/imgui-sys/src/lib.rs
+++ b/imgui-sys/src/lib.rs
@@ -930,7 +930,6 @@ extern "C" {
         custom_callback_data: *mut c_void,
     );
     pub fn igSetNextWindowContentSize(size: ImVec2);
-    pub fn igSetNextWindowContentWidth(width: c_float);
     pub fn igSetNextWindowCollapsed(collapsed: bool, cond: ImGuiCond);
     pub fn igSetNextWindowFocus();
     pub fn igSetWindowPos(pos: ImVec2, cond: ImGuiCond);
@@ -963,6 +962,15 @@ pub unsafe fn igSetNextWindowPosCenter(cond: ImGuiCond) {
     let pivot = ImVec2::new(0.5, 0.5);
     igSetNextWindowPos(pos, cond, pivot);
 }
+/// Set next window content's width.
+///
+/// Original non-deprecated version preserved last Y value set by
+/// [`igSetNextWindowContentSize`].
+#[allow(non_snake_case)]
+#[deprecated(since = "0.0.19", note = "please use igSetNextWindowContentSize instead")]
+pub unsafe fn igSetNextWindowContentWidth(width: c_float) {
+    igSetNextWindowContentSize(ImVec2 { x: width, y: 0.0 })
+}
 
 // Parameter stack (shared)
 extern "C" {