diff --git a/src/input/input_ebml.cpp b/src/input/input_ebml.cpp
index b7b88fd6..8401c0c8 100644
--- a/src/input/input_ebml.cpp
+++ b/src/input/input_ebml.cpp
@@ -131,7 +131,12 @@ namespace Mist{
       if (inFile == stdin){
         lastClusterBPos = 0;
       }else{
-        lastClusterBPos = Util::ftell(inFile);
+        int64_t bp = Util::ftell(inFile);
+        if(bp == -1 && errno == ESPIPE){
+          lastClusterBPos = 0;
+        }else{
+          lastClusterBPos = bp;
+        }
       }
       DONTEVEN_MSG("Found a cluster at position %llu", lastClusterBPos);
     }
diff --git a/src/input/input_ebml.h b/src/input/input_ebml.h
index 4b433f0c..057bcd8c 100644
--- a/src/input/input_ebml.h
+++ b/src/input/input_ebml.h
@@ -1,3 +1,4 @@
+#pragma once
 #include "input.h"
 #include <mist/util.h>
 
diff --git a/src/output/output_ebml.h b/src/output/output_ebml.h
index 37242bdf..35943a3e 100644
--- a/src/output/output_ebml.h
+++ b/src/output/output_ebml.h
@@ -1,3 +1,4 @@
+#pragma once
 #include "output_http.h"
 
 namespace Mist{
@@ -7,7 +8,7 @@ namespace Mist{
     static void init(Util::Config *cfg);
     void onHTTP();
     void sendNext();
-    void sendHeader();
+    virtual void sendHeader();
     uint32_t clusterSize(uint64_t start, uint64_t end);
 
   private: