diff --git a/src/main/java/net/schmizz/sshj/connection/channel/ChannelInputStream.java b/src/main/java/net/schmizz/sshj/connection/channel/ChannelInputStream.java
index f8027aa9..bc425cec 100644
--- a/src/main/java/net/schmizz/sshj/connection/channel/ChannelInputStream.java
+++ b/src/main/java/net/schmizz/sshj/connection/channel/ChannelInputStream.java
@@ -109,7 +109,7 @@ public final class ChannelInputStream
     public int read()
             throws IOException {
         synchronized (b) {
-            return read(b, 0, 1) == -1 ? -1 : b[0];
+            return read(b, 0, 1) == -1 ? -1 : b[0] & 0xff;
         }
     }
 
diff --git a/src/main/java/net/schmizz/sshj/sftp/RemoteFile.java b/src/main/java/net/schmizz/sshj/sftp/RemoteFile.java
index b5085f6b..0c03a7b9 100644
--- a/src/main/java/net/schmizz/sshj/sftp/RemoteFile.java
+++ b/src/main/java/net/schmizz/sshj/sftp/RemoteFile.java
@@ -171,7 +171,7 @@ public class RemoteFile
         @Override
         public int read()
                 throws IOException {
-            return read(b, 0, 1) == -1 ? -1 : b[0];
+            return read(b, 0, 1) == -1 ? -1 : b[0] & 0xff;
         }
 
         @Override