diff --git a/redo/test/page4.c b/redo/test/page4.c
index 1bfd26e9..8a2c1aaf 100644
--- a/redo/test/page4.c
+++ b/redo/test/page4.c
@@ -49,7 +49,7 @@ uiBox *makePage4(void)
 	pbar = uiNewProgressBar();
 	uiBoxAppend(page4, uiControl(pbar), 0);
 
-	// TODO separator
+	uiBoxAppend(page4, uiControl(uiNewHorizontalSeparator()), 0);
 
 	hbox = newHorizontalBox();
 	xsb = uiNewSpinbox(-40, 40);
diff --git a/redo/ui.idl b/redo/ui.idl
index 543eb5c5..480c83d6 100644
--- a/redo/ui.idl
+++ b/redo/ui.idl
@@ -166,6 +166,10 @@ interface Slider from Control {
 };
 func NewSlider(min intmax_t, max intmax_t) *Slider;
 
+interface Separator from Control {
+};
+func NewHorizontalSeparator(void) *Separator;
+
 interface Menu {
 	func AppendItem(name *const char) *MenuItem;
 	func AppendCheckItem(name *const char) *MenuItem;
diff --git a/redo/windows/GNUmakeinc.mk b/redo/windows/GNUmakeinc.mk
index 8dc920ff..b57b443c 100644
--- a/redo/windows/GNUmakeinc.mk
+++ b/redo/windows/GNUmakeinc.mk
@@ -16,6 +16,7 @@ osCFILES = \
 	windows/parent.c \
 	windows/progressbar.c \
 	windows/resize.c \
+	windows/separator.c \
 	windows/slider.c \
 	windows/spinbox.c \
 	windows/tab.c \
diff --git a/redo/windows/separator.c b/redo/windows/separator.c
new file mode 100644
index 00000000..ea9b04c4
--- /dev/null
+++ b/redo/windows/separator.c
@@ -0,0 +1,72 @@
+// 20 may 2015
+#include "uipriv_windows.h"
+
+// references:
+// - http://stackoverflow.com/questions/2892703/how-do-i-draw-separators
+// - https://msdn.microsoft.com/en-us/library/windows/desktop/dn742405%28v=vs.85%29.aspx
+
+struct separator {
+	uiSeparator s;
+	HWND hwnd;
+};
+
+static BOOL onWM_COMMAND(uiControl *c, WORD code, LRESULT *lResult)
+{
+	return FALSE;
+}
+
+static BOOL onWM_NOTIFY(uiControl *c, NMHDR *nm, LRESULT *lResult)
+{
+	return FALSE;
+}
+
+static BOOL onWM_HSCROLL(uiControl *c, WORD code, LRESULT *lResult)
+{
+	return FALSE;
+}
+
+static void onDestroy(void *data)
+{
+	struct separator *s = (struct separator *) data;
+
+	uiFree(s);
+}
+
+// via http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
+// TODO
+// TODO DPI independence?
+
+static void separatorPreferredSize(uiControl *c, uiSizing *d, intmax_t *width, intmax_t *height)
+{
+	*width = 1;		// TODO
+	*height = 2;		// what Spy++ says Windows XP's Explorer uses
+}
+
+uiSeparator *uiNewHorizontalSeparator(void)
+{
+	struct separator *s;
+	uiWindowsMakeControlParams p;
+
+	s = uiNew(struct separator);
+	uiTyped(s)->Type = uiTypeSeparator();
+
+	p.dwExStyle = 0;
+	p.lpClassName = L"static";
+	p.lpWindowName = L"";
+	p.dwStyle = SS_ETCHEDHORZ;
+	p.hInstance = hInstance;
+	p.lpParam = NULL;
+	p.useStandardControlFont = TRUE;
+	p.onWM_COMMAND = onWM_COMMAND;
+	p.onWM_NOTIFY = onWM_NOTIFY;
+	p.onWM_HSCROLL = onWM_HSCROLL;
+	p.onDestroy = onDestroy;
+	p.onDestroyData = s;
+	uiWindowsMakeControl(uiControl(s), &p);
+
+	s->hwnd = (HWND) uiControlHandle(uiControl(s));
+
+	uiControl(s)->PreferredSize = separatorPreferredSize;
+
+	return uiSeparator(s);
+}