diff --git a/README.md b/README.md
index ac64429..42ae0cb 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,8 @@ Refer to [https://st.suckless.org/](https://st.suckless.org/) for details on the
 
 ### Changelog:
 
+2022-10-24 - Added the fullscreen patch
+
 2022-08-28 - Added the use XftFontMatch patch
 
 2022-08-24 - Added the no window decorations patch
@@ -174,6 +176,9 @@ Refer to [https://st.suckless.org/](https://st.suckless.org/) for details on the
    - [~force-redraw-after-keypress~](https://lists.suckless.org/hackers/2004/17221.html)
       - ~this patch forces the terminal to check for new data on the tty on keypress with the aim of reducing input latency~
 
+   - [fullscreen](https://st.suckless.org/patches/fullscreen/)
+      - allows the st window to go into fullscreen mode
+
    - [gradient](https://st.suckless.org/patches/gradient/)
       - adds gradient transparency to st
       - depends on the alpha patch
diff --git a/config.def.h b/config.def.h
index ff6b5b3..2dcaef7 100644
--- a/config.def.h
+++ b/config.def.h
@@ -401,6 +401,10 @@ static Shortcut shortcuts[] = {
 	//{ TERMMOD,              XK_,           changealphaunfocused, {.f = -0.05} },
 	#endif // ALPHA_FOCUS_HIGHLIGHT_PATCH
 	#endif // ALPHA_PATCH
+	#if FULLSCREEN_PATCH
+	{ XK_NO_MOD,            XK_F11,         fullscreen,      {.i =  0} },
+	{ MODKEY,               XK_Return,      fullscreen,      {.i =  0} },
+	#endif // FULLSCREEN_PATCH
 	#if SCROLLBACK_PATCH
 	{ ShiftMask,            XK_Page_Up,     kscrollup,       {.i = -1}, S_PRI },
 	{ ShiftMask,            XK_Page_Down,   kscrolldown,     {.i = -1}, S_PRI },
diff --git a/patch/fullscreen_x.c b/patch/fullscreen_x.c
new file mode 100644
index 0000000..3fa65f7
--- /dev/null
+++ b/patch/fullscreen_x.c
@@ -0,0 +1,17 @@
+void
+fullscreen(const Arg *arg)
+{
+	XEvent ev;
+
+	memset(&ev, 0, sizeof(ev));
+
+	ev.xclient.type = ClientMessage;
+	ev.xclient.message_type = xw.netwmstate;
+	ev.xclient.display = xw.dpy;
+	ev.xclient.window = xw.win;
+	ev.xclient.format = 32;
+	ev.xclient.data.l[0] = 2; /* _NET_WM_STATE_TOGGLE */
+	ev.xclient.data.l[1] = xw.netwmfullscreen;
+
+	XSendEvent(xw.dpy, DefaultRootWindow(xw.dpy), False, SubstructureNotifyMask|SubstructureRedirectMask, &ev);
+}
diff --git a/patch/fullscreen_x.h b/patch/fullscreen_x.h
new file mode 100644
index 0000000..28a833b
--- /dev/null
+++ b/patch/fullscreen_x.h
@@ -0,0 +1 @@
+static void fullscreen(const Arg *arg);
diff --git a/patch/x_include.c b/patch/x_include.c
index cd058a1..cbea418 100644
--- a/patch/x_include.c
+++ b/patch/x_include.c
@@ -17,6 +17,9 @@
 #if FONT2_PATCH
 #include "font2.c"
 #endif
+#if FULLSCREEN_PATCH
+#include "fullscreen_x.c"
+#endif
 #if INVERT_PATCH
 #include "invert.c"
 #endif
diff --git a/patch/x_include.h b/patch/x_include.h
index 3eb1d19..6505909 100644
--- a/patch/x_include.h
+++ b/patch/x_include.h
@@ -14,6 +14,9 @@
 #if FONT2_PATCH
 #include "font2.h"
 #endif
+#if FULLSCREEN_PATCH
+#include "fullscreen_x.h"
+#endif
 #if INVERT_PATCH
 #include "invert.h"
 #endif
diff --git a/patches.def.h b/patches.def.h
index 26ae7e6..013cc10 100644
--- a/patches.def.h
+++ b/patches.def.h
@@ -180,6 +180,13 @@
  */
 #define FONT2_PATCH 0
 
+/* This patch adds the ability to toggle st into fullscreen mode.
+ * Two key bindings are defined: F11 which is typical with other applications and Alt+Enter
+ * which matches the default xterm behavior.
+ * https://st.suckless.org/patches/fullscreen/
+ */
+#define FULLSCREEN_PATCH 0
+
 /* Hide the X cursor whenever a key is pressed and show it back when the mouse is moved in
  * the terminal window.
  * https://st.suckless.org/patches/hidecursor/
diff --git a/st.h b/st.h
index 6305667..41af307 100644
--- a/st.h
+++ b/st.h
@@ -211,6 +211,9 @@ typedef struct {
 	Drawable buf;
 	GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
 	Atom xembed, wmdeletewin, netwmname, netwmiconname, netwmpid;
+	#if FULLSCREEN_PATCH
+	Atom netwmstate, netwmfullscreen;
+	#endif // FULLSCREEN_PATCH
 	#if NETWMICON_PATCH
 	Atom netwmicon;
 	#endif // NETWMICON_PATCH
diff --git a/x.c b/x.c
index fbfe8d6..7f42e4b 100644
--- a/x.c
+++ b/x.c
@@ -1581,6 +1581,11 @@ xinit(int cols, int rows)
 	XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
 			PropModeReplace, (uchar *)&thispid, 1);
 
+	#if FULLSCREEN_PATCH
+	xw.netwmstate = XInternAtom(xw.dpy, "_NET_WM_STATE", False);
+	xw.netwmfullscreen = XInternAtom(xw.dpy, "_NET_WM_STATE_FULLSCREEN", False);
+	#endif // FULLSCREEN_PATCH
+
 	win.mode = MODE_NUMLOCK;
 	resettitle();
 	xhints();