diff --git a/config.def.h b/config.def.h
index 77ff358..a4e496b 100644
--- a/config.def.h
+++ b/config.def.h
@@ -9,6 +9,7 @@ static const char selbordercolor[]  = "#005577";
 static const char selbgcolor[]      = "#005577";
 static const char selfgcolor[]      = "#eeeeee";
 static const unsigned int borderpx  = 1;        /* border pixel of windows */
+static const unsigned int gappx     = 1;        /* gap pixel between windows */
 static const unsigned int snap      = 32;       /* snap pixel */
 static const Bool showbar           = True;     /* False means no bar */
 static const Bool topbar            = True;     /* False means bottom bar */
diff --git a/dwm.c b/dwm.c
index 1d78655..6cc96ff 100644
--- a/dwm.c
+++ b/dwm.c
@@ -1703,7 +1703,7 @@ textnw(const char *text, unsigned int len) {
 
 void
 tile(Monitor *m) {
-	unsigned int i, n, h, mw, my, ty;
+	unsigned int i, n, h, r, g = 0, mw, my, ty;
 	Client *c;
 
 	for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
@@ -1711,19 +1711,21 @@ tile(Monitor *m) {
 		return;
 
 	if(n > m->nmaster)
-		mw = m->nmaster ? m->ww * m->mfact : 0;
+		mw = m->nmaster ? (m->ww - (g = gappx)) * m->mfact : 0;
 	else
 		mw = m->ww;
 	for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
 		if(i < m->nmaster) {
-			h = (m->wh - my) / (MIN(n, m->nmaster) - i);
+			r = MIN(n, m->nmaster) - i;
+			h = (m->wh - my - gappx * (r - 1)) / r;
 			resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False);
-			my += HEIGHT(c);
+			my += HEIGHT(c) + gappx;
 		}
 		else {
-			h = (m->wh - ty) / (n - i);
-			resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False);
-			ty += HEIGHT(c);
+			r = n - i;
+			h = (m->wh - ty - gappx * (r - 1)) / r;
+			resize(c, m->wx + mw + g, m->wy + ty, m->ww - mw - g - (2*c->bw), h - (2*c->bw), False);
+			ty += HEIGHT(c) + gappx;
 		}
 }