diff --git a/vertices.go b/vertices.go
index 3eacf0e58..9239e5dc1 100644
--- a/vertices.go
+++ b/vertices.go
@@ -17,7 +17,6 @@ package ebiten
 import (
 	"github.com/hajimehoshi/ebiten/internal/affine"
 	"github.com/hajimehoshi/ebiten/internal/restorable"
-	"github.com/hajimehoshi/ebiten/internal/web"
 )
 
 // texelAdjustment represents a number to be used to adjust texel.
@@ -26,13 +25,6 @@ import (
 // See #317.
 var texelAdjustment float32 = 256
 
-func init() {
-	if web.IsIOSSafari() {
-		// Texel adjustment causes glitches on iOS Safari.
-		texelAdjustment = 0
-	}
-}
-
 var (
 	quadFloat32Num     = restorable.QuadVertexSizeInBytes() / 4
 	theVerticesBackend = &verticesBackend{}
diff --git a/vertices_ios.go b/vertices_ios.go
new file mode 100644
index 000000000..34e1979c5
--- /dev/null
+++ b/vertices_ios.go
@@ -0,0 +1,22 @@
+// Copyright 2017 The Ebiten Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build ios
+
+package ebiten
+
+func init() {
+	// Texel adjustment causes glitches on iOS.
+	texelAdjustment = 0
+}
diff --git a/vertices_notios.go b/vertices_notios.go
new file mode 100644
index 000000000..bd8d401f2
--- /dev/null
+++ b/vertices_notios.go
@@ -0,0 +1,28 @@
+// Copyright 2017 The Ebiten Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !ios
+
+package ebiten
+
+import (
+	"github.com/hajimehoshi/ebiten/internal/web"
+)
+
+func init() {
+	if web.IsIOSSafari() {
+		// Texel adjustment causes glitches on iOS.
+		texelAdjustment = 0
+	}
+}