diff --git a/F-Droid/src/org/fdroid/fdroid/AppDetails.java b/F-Droid/src/org/fdroid/fdroid/AppDetails.java
index 5d7424405..4d2463f90 100644
--- a/F-Droid/src/org/fdroid/fdroid/AppDetails.java
+++ b/F-Droid/src/org/fdroid/fdroid/AppDetails.java
@@ -1502,7 +1502,7 @@ public class AppDetails extends AppCompatActivity implements ProgressListener, A
             if (totalBytes == -1) {
                 setProgressVisible(true);
                 progressBar.setIndeterminate(true);
-                progressSize.setText(readableFileSize(bytesDownloaded));
+                progressSize.setText(Utils.getFriendlySize(bytesDownloaded));
                 progressPercent.setText("");
             } else {
                 long percent = bytesDownloaded * 100 / totalBytes;
@@ -1510,24 +1510,11 @@ public class AppDetails extends AppCompatActivity implements ProgressListener, A
                 progressBar.setIndeterminate(false);
                 progressBar.setProgress((int) percent);
                 progressBar.setMax(100);
-                progressSize.setText(readableFileSize(bytesDownloaded) + " / " + readableFileSize(totalBytes));
+                progressSize.setText(Utils.getFriendlySize(bytesDownloaded) + " / " + Utils.getFriendlySize(totalBytes));
                 progressPercent.setText(Long.toString(percent) + " %");
             }
         }
 
-        /**
-         * Converts a number of bytes to a human readable file size (eg 3.5 GiB).
-         *
-         * Based on http://stackoverflow.com/a/5599842
-         */
-        public String readableFileSize(long bytes) {
-            final String[] units = getResources().getStringArray(R.array.file_size_units);
-            if (bytes <= 0) return "0 " + units[0];
-            int digitGroups = (int) (Math.log10(bytes) / Math.log10(1024));
-            return new DecimalFormat("#,##0.#")
-                    .format(bytes / Math.pow(1024, digitGroups)) + " " + units[digitGroups];
-        }
-
         /**
          * Shows or hides progress bar and related views.
          */
diff --git a/F-Droid/src/org/fdroid/fdroid/Utils.java b/F-Droid/src/org/fdroid/fdroid/Utils.java
index 14db5651d..e5ccd595c 100644
--- a/F-Droid/src/org/fdroid/fdroid/Utils.java
+++ b/F-Droid/src/org/fdroid/fdroid/Utils.java
@@ -186,7 +186,7 @@ public final class Utils {
         }
     }
 
-    public static String getFriendlySize(int size) {
+    public static String getFriendlySize(long size) {
         double s = size;
         int i = 0;
         while (i < FRIENDLY_SIZE_FORMAT.length - 1 && s >= 1024) {