diff --git a/src/main/java/net/woggioni/jzstd/ZstdInputStream.java b/src/main/java/net/woggioni/jzstd/ZstdInputStream.java
index a7da44e..adc20da 100644
--- a/src/main/java/net/woggioni/jzstd/ZstdInputStream.java
+++ b/src/main/java/net/woggioni/jzstd/ZstdInputStream.java
@@ -98,7 +98,7 @@ public class ZstdInputStream extends InputStream {
                     break;
                 } else fill();
             }
-            int toBeRead = Math.min(len, output.pos.intValue() - output.dst.position());
+            int toBeRead = Math.min(len - totalRead, output.pos.intValue() - output.dst.position());
             output.dst.get(arr, off + totalRead, toBeRead);
             totalRead += toBeRead;
         }