diff --git a/src/libdraw/replclipr.c b/src/libdraw/replclipr.c
new file mode 100644
index 0000000..ffd24b4
--- /dev/null
+++ b/src/libdraw/replclipr.c
@@ -0,0 +1,21 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+
+void
+replclipr(Image *i, int repl, Rectangle clipr)
+{
+	uchar *b;
+
+	b = bufimage(i->display, 22);
+	b[0] = 'c';
+	BPLONG(b+1, i->id);
+	repl = repl!=0;
+	b[5] = repl;
+	BPLONG(b+6, clipr.min.x);
+	BPLONG(b+10, clipr.min.y);
+	BPLONG(b+14, clipr.max.x);
+	BPLONG(b+18, clipr.max.y);
+	i->repl = repl;
+	i->clipr = clipr;
+}