diff --git a/imgui-sys/src/lib.rs b/imgui-sys/src/lib.rs
index 6b7eb61..46e0f07 100644
--- a/imgui-sys/src/lib.rs
+++ b/imgui-sys/src/lib.rs
@@ -357,6 +357,29 @@ bitflags!(
     }
 );
 
+bitflags!(
+    /// Flags for igBeginCombo
+    #[repr(C)]
+    pub struct ImGuiComboFlags: c_int {
+        /// Align the popup toward the left by default
+        const PopupAlignLeft = 1 << 0;
+        /// Max ~4 items visible.
+        /// Tip: If you want your combo popup to be a specific size you can use
+        /// igSetNextWindowSizeConstraints() prior to calling igBeginCombo()
+        const HeightSmall    = 1 << 1;
+        /// Max ~8 items visible (default)
+        const HeightRegular  = 1 << 2;
+        /// Max ~20 items visible
+        const HeightLarge    = 1 << 3;
+        /// As many fitting items as possible
+        const HeightLargest  = 1 << 4;
+        const HeightMask     = ImGuiComboFlags::HeightSmall.bits
+            | ImGuiComboFlags::HeightRegular.bits
+            | ImGuiComboFlags::HeightLarge.bits
+            | ImGuiComboFlags::HeightLargest.bits;
+    }
+);
+
 bitflags!(
     /// Flags for indictating which corner of a rectangle should be rounded
     #[repr(C)]
@@ -1156,28 +1179,6 @@ extern "C" {
     pub fn igCheckboxFlags(label: *const c_char, flags: *mut c_uint, flags_value: c_uint) -> bool;
     pub fn igRadioButtonBool(label: *const c_char, active: bool) -> bool;
     pub fn igRadioButton(label: *const c_char, v: *mut c_int, v_button: c_int) -> bool;
-    pub fn igCombo(
-        label: *const c_char,
-        current_item: *mut c_int,
-        items: *const *const c_char,
-        items_count: c_int,
-        height_in_items: c_int,
-    ) -> bool;
-    pub fn igCombo2(
-        label: *const c_char,
-        current_item: *mut c_int,
-        items_separated_by_zeros: *const c_char,
-        height_in_items: c_int,
-    ) -> bool;
-    pub fn igCombo3(
-        label: *const c_char,
-        current_item: *mut c_int,
-        items_getter: extern "C" fn(data: *mut c_void, idx: c_int, out_text: *mut *const c_char)
-                                    -> bool,
-        data: *mut c_void,
-        items_count: c_int,
-        height_in_items: c_int,
-    ) -> bool;
     pub fn igPlotLines(
         label: *const c_char,
         values: *const c_float,
@@ -1225,6 +1226,37 @@ extern "C" {
     pub fn igProgressBar(fraction: c_float, size_arg: *const ImVec2, overlay: *const c_char);
 }
 
+// Combo
+extern "C" {
+    pub fn igBeginCombo(
+        label: *const c_char,
+        preview_value: *const c_char,
+        flags: ImGuiComboFlags,
+    ) -> bool;
+    pub fn igEndCombo();
+    pub fn igCombo(
+        label: *const c_char,
+        current_item: *mut c_int,
+        items: *const *const c_char,
+        items_count: c_int,
+        height_in_items: c_int,
+    ) -> bool;
+    pub fn igCombo2(
+        label: *const c_char,
+        current_item: *mut c_int,
+        items_separated_by_zeros: *const c_char,
+        height_in_items: c_int,
+    ) -> bool;
+    pub fn igCombo3(
+        label: *const c_char,
+        current_item: *mut c_int,
+        items_getter: extern "C" fn(data: *mut c_void, idx: c_int, out_text: *mut *const c_char) -> bool,
+        data: *mut c_void,
+        items_count: c_int,
+        height_in_items: c_int,
+    ) -> bool;
+}
+
 // Widgets: Color Editor/Picker
 extern "C" {
     pub fn igColorEdit3(