diff --git a/redo/windows/GNUmakeinc.mk b/redo/windows/GNUmakeinc.mk
index 11064eab..790a795e 100644
--- a/redo/windows/GNUmakeinc.mk
+++ b/redo/windows/GNUmakeinc.mk
@@ -15,7 +15,6 @@ osCFILES = \
 	windows/group.c \
 	windows/init.c \
 	windows/label.c \
-	windows/logging.c \
 	windows/main.c \
 	windows/menu.c \
 	windows/parent.c \
diff --git a/redo/windows/logging.c b/redo/windows/logging.c
deleted file mode 100644
index e9bd0059..00000000
--- a/redo/windows/logging.c
+++ /dev/null
@@ -1,58 +0,0 @@
-// 9 june 2015
-#include "uipriv_windows.h"
-
-// We can't use the private heap for these functions, since they are allowed to be run before uiInit() or after uiUninit().
-
-static void nomemlog(void)
-{
-	OutputDebugStringW(L"[libui] memory exhausted logging message");
-	DebugBreak();
-	abort();			// just in case
-}
-
-void uiLog(const char *format, ...)
-{
-	va_list ap;
-
-	va_start(ap, format);
-	uiLogv(format, ap);
-	va_end(ap);
-}
-
-void uiLogv(const char *format, va_list ap)
-{
-	va_list ap2;
-	int n;
-	char *buf;
-
-	va_copy(ap2, ap);
-	n = _vscprintf(format, ap2);
-	va_end(ap2);
-	// "[libui] message\0" == (8 + n + 1)
-	buf = (char *) malloc((8 + n + 1)
-	if (buf == NULL)
-		nomemlog();
-	buf[0] = '[';
-	buf[1] = 'l';
-	buf[2] = 'i';
-	buf[3] = 'b';
-	buf[4] = 'u';
-	buf[5] = 'i';
-	buf[6] = ']';
-	buf[7] = ' ';
-	vsnprintf_s(buf + 8, n + 1, n, format, ap);
-	// breaking the rules: we can't reliably tell that the encoding of debugging messages is UTF-8 like we could with everything else :/
-	OutputDebugStringA(buf);
-	free(buf);
-}
-
-void complain(const char *format, ...)
-{
-	va_list ap;
-
-	va_start(ap, format);
-	uiLogv(format, av);
-	va_end(ap);
-	DebugBreak();
-	abort();		// just in case
-}
diff --git a/redo/windows/util.c b/redo/windows/util.c
index 082c9143..eb5a0e30 100644
--- a/redo/windows/util.c
+++ b/redo/windows/util.c
@@ -34,6 +34,19 @@ int windowClassOf(HWND hwnd, ...)
 	return -1;
 }
 
+void complain(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	fprintf(stderr, "[libui] ");
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+	DebugBreak();
+	abort();		// just in case
+}
+
 // wrapper around MapWindowRect() that handles the complex error handling
 void mapWindowRect(HWND from, HWND to, RECT *r)
 {