diff --git a/canvas.go b/canvas.go
index 9ba13e7..a1bc4b7 100644
--- a/canvas.go
+++ b/canvas.go
@@ -131,7 +131,7 @@ loop:
 	}
 }
 
-const bufferTextureSize = 2048
+const alphaTexSize = 2048
 
 var (
 	gli      GL
@@ -248,7 +248,7 @@ func LoadGL(glimpl GL) (err error) {
 	gli.TexParameteri(gl_TEXTURE_2D, gl_TEXTURE_MAG_FILTER, gl_NEAREST)
 	gli.TexParameteri(gl_TEXTURE_2D, gl_TEXTURE_WRAP_S, gl_CLAMP_TO_EDGE)
 	gli.TexParameteri(gl_TEXTURE_2D, gl_TEXTURE_WRAP_T, gl_CLAMP_TO_EDGE)
-	gli.TexImage2D(gl_TEXTURE_2D, 0, gl_ALPHA, bufferTextureSize, bufferTextureSize, 0, gl_ALPHA, gl_UNSIGNED_BYTE, nil)
+	gli.TexImage2D(gl_TEXTURE_2D, 0, gl_ALPHA, alphaTexSize, alphaTexSize, 0, gl_ALPHA, gl_UNSIGNED_BYTE, nil)
 
 	gli.Enable(gl_BLEND)
 	gli.BlendFunc(gl_SRC_ALPHA, gl_ONE_MINUS_SRC_ALPHA)
diff --git a/text.go b/text.go
index c5bc0f2..31156cd 100644
--- a/text.go
+++ b/text.go
@@ -19,6 +19,7 @@ type Font struct {
 }
 
 var fonts = make(map[string]*Font)
+var zeroes [alphaTexSize]byte
 
 func LoadFont(src interface{}, name string) (*Font, error) {
 	var f *Font
@@ -94,15 +95,15 @@ func (cv *Canvas) FillText(str string, x, y float32) {
 
 		for y, w, h := 0, bounds.Dx(), bounds.Dy(); y < h; y++ {
 			off := y * mask.Stride
-			gli.TexSubImage2D(gl_TEXTURE_2D, 0, 0, int32(bufferTextureSize-1-y), int32(w), 1, gl_ALPHA, gl_UNSIGNED_BYTE, gli.Ptr(&mask.Pix[off]))
+			gli.TexSubImage2D(gl_TEXTURE_2D, 0, 0, int32(alphaTexSize-1-y), int32(w), 1, gl_ALPHA, gl_UNSIGNED_BYTE, gli.Ptr(&mask.Pix[off]))
 		}
 
 		p0 := cv.tf(lm.Vec2{float32(bounds.Min.X) + x, float32(bounds.Min.Y) + y})
 		p1 := cv.tf(lm.Vec2{float32(bounds.Min.X) + x, float32(bounds.Max.Y) + y})
 		p2 := cv.tf(lm.Vec2{float32(bounds.Max.X) + x, float32(bounds.Max.Y) + y})
 		p3 := cv.tf(lm.Vec2{float32(bounds.Max.X) + x, float32(bounds.Min.Y) + y})
-		tw := float32(bounds.Dx()) / bufferTextureSize
-		th := float32(bounds.Dy()) / bufferTextureSize
+		tw := float32(bounds.Dx()) / alphaTexSize
+		th := float32(bounds.Dy()) / alphaTexSize
 		data := [16]float32{p0[0], p0[1], p1[0], p1[1], p2[0], p2[1], p3[0], p3[1],
 			0, 1, 0, 1 - th, tw, 1 - th, tw, 1}
 		gli.BufferData(gl_ARRAY_BUFFER, len(data)*4, unsafe.Pointer(&data[0]), gl_STREAM_DRAW)
@@ -111,6 +112,10 @@ func (cv *Canvas) FillText(str string, x, y float32) {
 		gli.VertexAttribPointer(alphaTexCoord, 2, gl_FLOAT, false, 0, gli.PtrOffset(8*4))
 		gli.DrawArrays(gl_TRIANGLE_FAN, 0, 4)
 
+		for y, w, h := 0, bounds.Dx(), bounds.Dy(); y < h; y++ {
+			gli.TexSubImage2D(gl_TEXTURE_2D, 0, 0, int32(alphaTexSize-1-y), int32(w), 1, gl_ALPHA, gl_UNSIGNED_BYTE, gli.Ptr(&zeroes[0]))
+		}
+
 		x += float32(advance) / 64
 	}