diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/MainActivity.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/MainActivity.kt
index ed1636299..0b0134d3c 100644
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/MainActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/MainActivity.kt
@@ -272,13 +272,13 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
     private fun increaseColumnCount() {
         config.dirColumnCnt = ++(directories_grid.layoutManager as GridLayoutManager).spanCount
         invalidateOptionsMenu()
-        directories_grid.adapter.notifyDataSetChanged()
+        directories_grid.adapter?.notifyDataSetChanged()
     }
 
     private fun reduceColumnCount() {
         config.dirColumnCnt = --(directories_grid.layoutManager as GridLayoutManager).spanCount
         invalidateOptionsMenu()
-        directories_grid.adapter.notifyDataSetChanged()
+        directories_grid.adapter?.notifyDataSetChanged()
     }
 
     private fun isPickImageIntent(intent: Intent) = isPickIntent(intent) && (hasImageContentData(intent) || isImageType(intent))
diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/MediaActivity.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/MediaActivity.kt
index a88097494..ef9344764 100644
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/MediaActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/MediaActivity.kt
@@ -360,13 +360,13 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
     private fun increaseColumnCount() {
         config.mediaColumnCnt = ++(media_grid.layoutManager as GridLayoutManager).spanCount
         invalidateOptionsMenu()
-        media_grid.adapter.notifyDataSetChanged()
+        media_grid.adapter?.notifyDataSetChanged()
     }
 
     private fun reduceColumnCount() {
         config.mediaColumnCnt = --(media_grid.layoutManager as GridLayoutManager).spanCount
         invalidateOptionsMenu()
-        media_grid.adapter.notifyDataSetChanged()
+        media_grid.adapter?.notifyDataSetChanged()
     }
 
     private fun isSetWallpaperIntent() = intent.getBooleanExtra(SET_WALLPAPER_INTENT, false)