diff --git a/app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt b/app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt
index 563ca39a..594b137c 100644
--- a/app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt
+++ b/app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt
@@ -172,7 +172,7 @@ class ViewImageFragment : ViewMediaFragment() {
     }
 
     override fun onToolbarVisibilityChange(visible: Boolean) {
-        if (photoView == null || !userVisibleHint) {
+        if (photoView == null || !userVisibleHint || captionSheet == null) {
             return
         }
         isDescriptionVisible = showingDescription && visible
@@ -180,7 +180,7 @@ class ViewImageFragment : ViewMediaFragment() {
         captionSheet.animate().alpha(alpha)
                 .setListener(object : AnimatorListenerAdapter() {
                     override fun onAnimationEnd(animation: Animator) {
-                        captionSheet.visible(isDescriptionVisible)
+                        captionSheet?.visible(isDescriptionVisible)
                         animation.removeListener(this)
                     }
                 })