diff --git a/doc/bspwm.1 b/doc/bspwm.1
index 60955c2..c4f9d08 100644
--- a/doc/bspwm.1
+++ b/doc/bspwm.1
@@ -2,12 +2,12 @@
 .\"     Title: bspwm
 .\"    Author: [see the "Author" section]
 .\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
-.\"      Date: 01/15/2015
+.\"      Date: 02/21/2015
 .\"    Manual: Bspwm Manual
 .\"    Source: Bspwm 0.8.9
 .\"  Language: English
 .\"
-.TH "BSPWM" "1" "01/15/2015" "Bspwm 0\&.8\&.9" "Bspwm Manual"
+.TH "BSPWM" "1" "02/21/2015" "Bspwm 0\&.8\&.9" "Bspwm Manual"
 .\" -----------------------------------------------------------------
 .\" * Define some portability stuff
 .\" -----------------------------------------------------------------
@@ -900,7 +900,7 @@ rule \fIOPTIONS\fR
 \fBOptions\fR
 .RS 4
 .PP
-\fB\-a\fR, \fB\-\-add\fR <class_name>|<instance_name>|* [\fB\-o\fR|\fB\-\-one\-shot\fR] [monitor=MONITOR_SEL|desktop=DESKTOP_SEL|window=WINDOW_SEL] [(floating|fullscreen|pseudo_tiled|locked|sticky|private|center|follow|manage|focus|border)=(on|off)] [split_dir=DIR]
+\fB\-a\fR, \fB\-\-add\fR <class_name>|<instance_name>|* [\fB\-o\fR|\fB\-\-one\-shot\fR] [monitor=MONITOR_SEL|desktop=DESKTOP_SEL|window=WINDOW_SEL] [(floating|fullscreen|pseudo_tiled|locked|sticky|private|center|follow|manage|focus|border)=(on|off)] [split_dir=DIR] [split_ratio=RATIO]
 .RS 4
 Create a new rule\&.
 .RE
diff --git a/doc/bspwm.1.txt b/doc/bspwm.1.txt
index bed3768..d2bfd1a 100644
--- a/doc/bspwm.1.txt
+++ b/doc/bspwm.1.txt
@@ -552,7 +552,7 @@ rule 'OPTIONS'
 Options
 ^^^^^^^
 
-*-a*, *--add* <class_name>|<instance_name>|* [*-o*|*--one-shot*] [monitor=MONITOR_SEL|desktop=DESKTOP_SEL|window=WINDOW_SEL] [(floating|fullscreen|pseudo_tiled|locked|sticky|private|center|follow|manage|focus|border)=(on|off)] [split_dir=DIR]::
+*-a*, *--add* <class_name>|<instance_name>|* [*-o*|*--one-shot*] [monitor=MONITOR_SEL|desktop=DESKTOP_SEL|window=WINDOW_SEL] [(floating|fullscreen|pseudo_tiled|locked|sticky|private|center|follow|manage|focus|border)=(on|off)] [split_dir=DIR] [split_ratio=RATIO]::
 	Create a new rule.
 
 *-r*, *--remove* ^<n>|head|tail|<class_name>|<instance_name>|*...::
diff --git a/rule.c b/rule.c
index 60bd0fc..862445e 100644
--- a/rule.c
+++ b/rule.c
@@ -280,6 +280,11 @@ void parse_key_value(char *key, char *value, rule_consequence_t *csq)
 		snprintf(csq->node_desc, sizeof(csq->node_desc), "%s", value);
 	} else if (streq("split_dir", key)) {
 		snprintf(csq->split_dir, sizeof(csq->split_dir), "%s", value);
+	} else if (streq("split_ratio", key)) {
+		double rat;
+		if (sscanf(value, "%lf", &rat) == 1 && rat > 0 && rat < 1) {
+			csq->split_ratio = rat;
+		}
 	} else if (parse_bool(value, &v)) {
 		if (streq("floating", key))
 			csq->floating = v;
diff --git a/types.h b/types.h
index 3fca404..58449ea 100644
--- a/types.h
+++ b/types.h
@@ -273,6 +273,7 @@ typedef struct {
 	char desktop_desc[MAXLEN];
 	char node_desc[MAXLEN];
 	char split_dir[SMALEN];
+	double split_ratio;
 	uint16_t min_width;
 	uint16_t max_width;
 	uint16_t min_height;
diff --git a/window.c b/window.c
index 253e80d..b7288ee 100644
--- a/window.c
+++ b/window.c
@@ -118,6 +118,10 @@ void manage_window(xcb_window_t win, rule_consequence_t *csq, int fd)
 		}
 	}
 
+	if (csq->split_ratio != 0) {
+		f->split_ratio = csq->split_ratio;
+	}
+
 	client_t *c = make_client(win, csq->border ? d->border_width : 0);
 	update_floating_rectangle(c);
 	if (c->floating_rectangle.x == 0 && c->floating_rectangle.y == 0)