diff --git a/go.mod b/go.mod
index 4ab6947..02838f9 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,7 @@
 module git.milar.in/milarin/buf2d
 
 go 1.18
+
+require github.com/mattn/go-runewidth v0.0.14
+
+require github.com/rivo/uniseg v0.2.0 // indirect
diff --git a/go.sum b/go.sum
index e69de29..2579e19 100644
--- a/go.sum
+++ b/go.sum
@@ -0,0 +1,4 @@
+github.com/mattn/go-runewidth v0.0.14 h1:+xnbZSEeDbOIg5/mE6JF0w6n9duR1l3/WmbinWVwUuU=
+github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
diff --git a/write_string.go b/write_string.go
index 522dc79..fe77652 100644
--- a/write_string.go
+++ b/write_string.go
@@ -2,19 +2,23 @@ package buf2d
 
 import (
 	"strings"
+
+	"github.com/mattn/go-runewidth"
 )
 
-// WriteString writes a whole string to the buffer at position (x,y)
-// no word wrap is applied at all. If the string does not fit, it will be truncated
-func WriteString(b *Buffer[rune], str string, x, y int) {
+// WriteString writes a whole string to the buffer at position (x,y).
+// no word wrap is applied at all. If the string does not fit, it will be truncated.
+// It returns the amount of runes in str
+func WriteString(b *Buffer[rune], str string, x, y int) (width int) {
 	dx := x
 	for _, r := range str {
-		if dx >= b.width {
+		if dx >= b.Width() {
 			return
 		}
 		b.Set(dx, y, r)
-		dx++
+		dx += runewidth.RuneWidth(r)
 	}
+	return dx - x
 }
 
 // WriteMultiLineString writes a multi-line string to the buffer at position (x,y)