diff --git a/config.def.h b/config.def.h
index 8543ea2..7c55ef2 100644
--- a/config.def.h
+++ b/config.def.h
@@ -62,6 +62,7 @@ static Shortcut shortcuts[] = {
 	{ MODKEY|ShiftMask,	XK_Prior,	xzoom,		{.i = +1} },
 	{ MODKEY|ShiftMask,	XK_Next,	xzoom,		{.i = -1} },
 	{ ShiftMask,		XK_Insert,	selpaste,	{.i =  0} },
+	{ MODKEY,		XK_Num_Lock,	numlock,	{.i =  0} },
 };
 
 /*
@@ -73,6 +74,7 @@ static Shortcut shortcuts[] = {
  * keypad value:
  * * 0: no value
  * * > 0: keypad application mode enabled
+ * *   = 2: term.numlock = 1
  * * < 0: keypad application mode disabled
  * cursor value:
  * * 0: no value
@@ -123,24 +125,24 @@ static Key key[] = {
 	{ XK_KP_Insert,     XK_ANY_MOD,     "\033[2~",       0,    0,    0},
 	{ XK_KP_Delete,     ShiftMask,      "\033[3;2~",     0,    0,    0},
 	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[3~",       0,    0,    0},
-	{ XK_KP_Multiply,   XK_ANY_MOD,     "\033Oj",       +1,    0,    0},
-	{ XK_KP_Add,        XK_ANY_MOD,     "\033Ok",       +1,    0,    0},
-	{ XK_KP_Enter,      XK_ANY_MOD,     "\033OM",       +1,    0,    0},
+	{ XK_KP_Multiply,   XK_ANY_MOD,     "\033Oj",       +2,    0,    0},
+	{ XK_KP_Add,        XK_ANY_MOD,     "\033Ok",       +2,    0,    0},
+	{ XK_KP_Enter,      XK_ANY_MOD,     "\033OM",       +2,    0,    0},
 	{ XK_KP_Enter,      XK_ANY_MOD,     "\r",           -1,    0,   -1},
 	{ XK_KP_Enter,      XK_ANY_MOD,     "\r\n",         -1,    0,   +1},
-	{ XK_KP_Subtract,   XK_ANY_MOD,     "\033Om",       +1,    0,    0},
-	{ XK_KP_Decimal,    XK_ANY_MOD,     "\033On",       +1,    0,    0},
-	{ XK_KP_Divide,     XK_ANY_MOD,     "\033Oo",       +1,    0,    0},
-	{ XK_KP_0,          XK_ANY_MOD,     "\033Op",       +1,    0,    0},
-	{ XK_KP_1,          XK_ANY_MOD,     "\033Oq",       +1,    0,    0},
-	{ XK_KP_2,          XK_ANY_MOD,     "\033Or",       +1,    0,    0},
-	{ XK_KP_3,          XK_ANY_MOD,     "\033Os",       +1,    0,    0},
-	{ XK_KP_4,          XK_ANY_MOD,     "\033Ot",       +1,    0,    0},
-	{ XK_KP_5,          XK_ANY_MOD,     "\033Ou",       +1,    0,    0},
-	{ XK_KP_6,          XK_ANY_MOD,     "\033Ov",       +1,    0,    0},
-	{ XK_KP_7,          XK_ANY_MOD,     "\033Ow",       +1,    0,    0},
-	{ XK_KP_8,          XK_ANY_MOD,     "\033Ox",       +1,    0,    0},
-	{ XK_KP_9,          XK_ANY_MOD,     "\033Oy",       +1,    0,    0},
+	{ XK_KP_Subtract,   XK_ANY_MOD,     "\033Om",       +2,    0,    0},
+	{ XK_KP_Decimal,    XK_ANY_MOD,     "\033On",       +2,    0,    0},
+	{ XK_KP_Divide,     XK_ANY_MOD,     "\033Oo",       +2,    0,    0},
+	{ XK_KP_0,          XK_ANY_MOD,     "\033Op",       +2,    0,    0},
+	{ XK_KP_1,          XK_ANY_MOD,     "\033Oq",       +2,    0,    0},
+	{ XK_KP_2,          XK_ANY_MOD,     "\033Or",       +2,    0,    0},
+	{ XK_KP_3,          XK_ANY_MOD,     "\033Os",       +2,    0,    0},
+	{ XK_KP_4,          XK_ANY_MOD,     "\033Ot",       +2,    0,    0},
+	{ XK_KP_5,          XK_ANY_MOD,     "\033Ou",       +2,    0,    0},
+	{ XK_KP_6,          XK_ANY_MOD,     "\033Ov",       +2,    0,    0},
+	{ XK_KP_7,          XK_ANY_MOD,     "\033Ow",       +2,    0,    0},
+	{ XK_KP_8,          XK_ANY_MOD,     "\033Ox",       +2,    0,    0},
+	{ XK_KP_9,          XK_ANY_MOD,     "\033Oy",       +2,    0,    0},
 	{ XK_BackSpace,     XK_NO_MOD,      "\177",          0,    0,    0},
 	{ XK_Up,            ShiftMask,      "\033[1;2A",     0,    0,    0},
 	{ XK_Up,            ControlMask,    "\033[1;5A",     0,    0,    0},
diff --git a/st.c b/st.c
index 1647cbd..671b386 100644
--- a/st.c
+++ b/st.c
@@ -194,6 +194,7 @@ typedef struct {
 	int bot;	/* bottom scroll limit */
 	int mode;	/* terminal mode flags */
 	int esc;	/* escape state flags */
+	bool numlock;	/* lock numbers in keyboard */
 	bool *tabs;
 } Term;
 
@@ -261,6 +262,7 @@ typedef struct {
 /* function definitions used in config.h */
 static void xzoom(const Arg *);
 static void selpaste(const Arg *);
+static void numlock(const Arg *);
 
 /* Config.h for applying patches and the configuration. */
 #include "config.h"
@@ -1100,6 +1102,7 @@ tnew(int col, int row) {
 		term.alt [row] = xmalloc(term.col * sizeof(Glyph));
 		term.dirty[row] = 0;
 	}
+	term.numlock = 1;
 	memset(term.tabs, 0, term.col * sizeof(*term.tabs));
 	/* setup screen */
 	treset();
@@ -2700,6 +2703,12 @@ match(uint mask, uint state) {
 	return true;
 }
 
+void
+numlock(const Arg *dummy)
+{
+	term.numlock ^= 1;
+}
+
 char*
 kmap(KeySym k, uint state) {
 	uint mask;
@@ -2725,8 +2734,12 @@ kmap(KeySym k, uint state) {
 		if(!match(mask, state))
 			continue;
 
-		if((kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) ||
-				(kp->appkey > 0 && !IS_SET(MODE_APPKEYPAD))) {
+		if(kp->appkey > 0) {
+			if(!IS_SET(MODE_APPKEYPAD))
+				continue;
+			if(term.numlock && kp->appkey == 2)
+				continue;
+		} else if (kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
 			continue;
 		}