diff --git a/zoomable-image/sub-sampling-image/src/main/kotlin/me/saket/telephoto/subsamplingimage/RealSubSamplingImageState.kt b/zoomable-image/sub-sampling-image/src/main/kotlin/me/saket/telephoto/subsamplingimage/RealSubSamplingImageState.kt
index dc3b38db..c202622a 100644
--- a/zoomable-image/sub-sampling-image/src/main/kotlin/me/saket/telephoto/subsamplingimage/RealSubSamplingImageState.kt
+++ b/zoomable-image/sub-sampling-image/src/main/kotlin/me/saket/telephoto/subsamplingimage/RealSubSamplingImageState.kt
@@ -30,6 +30,7 @@ import me.saket.telephoto.subsamplingimage.internal.ImageSampleSize
 import me.saket.telephoto.subsamplingimage.internal.ViewportImageTile
 import me.saket.telephoto.subsamplingimage.internal.ViewportTile
 import me.saket.telephoto.subsamplingimage.internal.calculateFor
+import me.saket.telephoto.subsamplingimage.internal.contains
 import me.saket.telephoto.subsamplingimage.internal.fastMapNotNull
 import me.saket.telephoto.subsamplingimage.internal.generate
 import me.saket.telephoto.subsamplingimage.internal.isNotEmpty