diff --git a/src/main/java/eu/siacs/conversations/persistance/FileBackend.java b/src/main/java/eu/siacs/conversations/persistance/FileBackend.java
index 821899eb7..faeca6308 100644
--- a/src/main/java/eu/siacs/conversations/persistance/FileBackend.java
+++ b/src/main/java/eu/siacs/conversations/persistance/FileBackend.java
@@ -437,7 +437,7 @@ public class FileBackend {
             return bitmap;
         }
         final String mime = attachment.getMime();
-        if ("application/pdf".equals(mime) && Compatibility.runsTwentyOne()) {
+        if ("application/pdf".equals(mime)) {
             bitmap = cropCenterSquarePdf(attachment.getUri(), size);
             drawOverlay(
                     bitmap,
@@ -961,7 +961,7 @@ public class FileBackend {
                 }
                 DownloadableFile file = getFile(message);
                 final String mime = file.getMimeType();
-                if ("application/pdf".equals(mime) && Compatibility.runsTwentyOne()) {
+                if ("application/pdf".equals(mime)) {
                     thumbnail = getPdfDocumentPreview(file, size);
                 } else if (mime.startsWith("video/")) {
                     thumbnail = getVideoPreview(file, size);
@@ -1507,12 +1507,12 @@ public class FileBackend {
             body.append(url);
         }
         body.append('|').append(file.getSize());
-        if (image || video || (pdf && Compatibility.runsTwentyOne())) {
+        if (image || video || pdf) {
             try {
                 final Dimensions dimensions;
                 if (video) {
                     dimensions = getVideoDimensions(file);
-                } else if (pdf && Compatibility.runsTwentyOne()) {
+                } else if (pdf) {
                     dimensions = getPdfDocumentDimensions(file);
                 } else {
                     dimensions = getImageDimensions(file);
diff --git a/src/main/java/eu/siacs/conversations/ui/util/Attachment.java b/src/main/java/eu/siacs/conversations/ui/util/Attachment.java
index b539c70ef..f994955d0 100644
--- a/src/main/java/eu/siacs/conversations/ui/util/Attachment.java
+++ b/src/main/java/eu/siacs/conversations/ui/util/Attachment.java
@@ -179,7 +179,7 @@ public class Attachment implements Parcelable {
     private static boolean renderFileThumbnail(final String mime) {
         return mime.startsWith("video/")
                 || isImage(mime)
-                || (Compatibility.runsTwentyOne() && "application/pdf".equals(mime));
+                || "application/pdf".equals(mime);
     }
 
     public Uri getUri() {
diff --git a/src/main/java/eu/siacs/conversations/utils/Compatibility.java b/src/main/java/eu/siacs/conversations/utils/Compatibility.java
index f181853c6..aadeaabf5 100644
--- a/src/main/java/eu/siacs/conversations/utils/Compatibility.java
+++ b/src/main/java/eu/siacs/conversations/utils/Compatibility.java
@@ -43,10 +43,6 @@ public class Compatibility {
         return Build.VERSION.SDK_INT < Build.VERSION_CODES.M || ContextCompat.checkSelfPermission(context, android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
     }
 
-    public static boolean runsTwentyOne() {
-        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
-    }
-
     private static boolean runsTwentyFour() {
         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N;
     }