diff --git a/app/src/main/java/org/fdroid/fdroid/net/LocalHTTPD.java b/app/src/main/java/org/fdroid/fdroid/net/LocalHTTPD.java
index d6d2f7633..7d893287d 100644
--- a/app/src/main/java/org/fdroid/fdroid/net/LocalHTTPD.java
+++ b/app/src/main/java/org/fdroid/fdroid/net/LocalHTTPD.java
@@ -265,7 +265,10 @@ public class LocalHTTPD extends NanoHTTPD {
                             return (int) dataLen;
                         }
                     };
-                    fis.skip(startFrom);
+                    long skipped = fis.skip(startFrom);
+                    if (skipped != startFrom) {
+                        throw new IOException("unable to skip the required " + startFrom + " bytes.");
+                    }
 
                     res = createResponse(Response.Status.PARTIAL_CONTENT, mime, fis);
                     res.addHeader("Content-Length", String.valueOf(dataLen));
diff --git a/app/src/main/java/org/fdroid/fdroid/net/bluetooth/BluetoothServer.java b/app/src/main/java/org/fdroid/fdroid/net/bluetooth/BluetoothServer.java
index dc935199f..ba2a4f518 100644
--- a/app/src/main/java/org/fdroid/fdroid/net/bluetooth/BluetoothServer.java
+++ b/app/src/main/java/org/fdroid/fdroid/net/bluetooth/BluetoothServer.java
@@ -303,7 +303,10 @@ public class BluetoothServer extends Thread {
                                 return (int) dataLen;
                             }
                         };
-                        fis.skip(startFrom);
+                        long skipped = fis.skip(startFrom);
+                        if (skipped != startFrom) {
+                            throw new IOException("unable to skip the required " + startFrom + " bytes.");
+                        }
 
                         res = createResponse(NanoHTTPD.Response.Status.PARTIAL_CONTENT, mime, fis);
                         res.addHeader("Content-Length", String.valueOf(dataLen));