diff --git a/sxot.c b/sxot.c
index de87126..712ba66 100644
--- a/sxot.c
+++ b/sxot.c
@@ -31,6 +31,7 @@
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 #include <X11/extensions/Xfixes.h>
+#include <X11/extensions/Xrandr.h>
 
 typedef uint8_t     u8;
 typedef uint32_t    u32;
@@ -207,6 +208,7 @@ main(int argc, char *argv[])
 		"usage: sxot [options]\n"
 		"Options:\n"
 		"  -g, --geom <x,y,w,h>   Capture the specified rectangle\n"
+		"  -m, --monitor n        Capture the specified monitor\n"
 		"  -c, --curosr           Capture the cursor also\n"
 	);
 	Str version = S(
@@ -237,6 +239,20 @@ main(int argc, char *argv[])
 			if (!parse_geom(opt.v, str_from_cstr(argv[++i]))) {
 				fatal(S("invalid geometry\n"));
 			}
+
+		} else if (str_eq(arg, S("--monitor")) || str_eq(arg, S("-m"))) {
+			int m[1];
+			str_to_int(str_from_cstr(argv[++i]), m);
+
+			XRRScreenResources *screen;
+			screen = XRRGetScreenResources (x11.dpy, DefaultRootWindow(x11.dpy));
+			XRRCrtcInfo *crtc_info;
+			crtc_info = XRRGetCrtcInfo (x11.dpy, screen, screen->crtcs[m[0]]);
+
+				opt.x = crtc_info->x;
+			opt.y = crtc_info->y;
+			opt.h = crtc_info->height;
+			opt.w = crtc_info->width;
 		} else if (str_eq(arg, S("--cursor")) || str_eq(arg, S("-c"))) {
 			opt.capture_cursor = true;
 		} else if (str_eq(arg, S("--help")) || str_eq(arg, S("-h"))) {