diff --git a/lib/UserInterface/textinput/Editor.cpp b/lib/UserInterface/textinput/Editor.cpp
index 027e7c76..8eb61378 100644
--- a/lib/UserInterface/textinput/Editor.cpp
+++ b/lib/UserInterface/textinput/Editor.cpp
@@ -20,6 +20,7 @@
 #include "textinput/Callbacks.h"
 #include "textinput/History.h"
 #include "textinput/KeyBinding.h"
+#include "textinput/StreamReaderUnix.h"
 #include "textinput/TextInput.h"
 #include "textinput/TextInputContext.h"
 
@@ -449,6 +450,9 @@ namespace textinput {
         ProcessMove(kMoveEnd, R);
         std::vector<std::string> completions;
         TabCompletion* tc = fContext->GetCompletion();
+        Reader* reader = fContext->GetReaders()[0];
+        StreamReaderUnix* streamReader = (StreamReaderUnix*)(reader);
+        if (!streamReader->IsFromTTY()) return kPRSuccess;
         if (tc) {
           bool ret = tc->Complete(Line, Cursor, R, completions);
           if (ret) {
diff --git a/lib/UserInterface/textinput/Reader.h b/lib/UserInterface/textinput/Reader.h
index ef7b3edb..a19350ec 100644
--- a/lib/UserInterface/textinput/Reader.h
+++ b/lib/UserInterface/textinput/Reader.h
@@ -38,6 +38,8 @@ namespace textinput {
     virtual bool HavePendingInput(bool wait) = 0;
     virtual bool HaveBufferedInput() const { return false; }
     virtual bool ReadInput(size_t& nRead, InputData& in) = 0;
+
+    virtual bool IsFromTTY() = 0;
   private:
     TextInputContext* fContext; // Context object
   };
diff --git a/lib/UserInterface/textinput/StreamReaderUnix.h b/lib/UserInterface/textinput/StreamReaderUnix.h
index 586b8a65..965a5eb3 100644
--- a/lib/UserInterface/textinput/StreamReaderUnix.h
+++ b/lib/UserInterface/textinput/StreamReaderUnix.h
@@ -36,6 +36,7 @@ namespace textinput {
     bool HaveBufferedInput() const { return !fReadAheadBuffer.empty(); }
     bool ReadInput(size_t& nRead, InputData& in);
 
+    bool IsFromTTY() override { return fIsTTY; }
   private:
     int ReadRawCharacter();
     bool ProcessCSI(InputData& in);
diff --git a/lib/UserInterface/textinput/StreamReaderWin.h b/lib/UserInterface/textinput/StreamReaderWin.h
index 239f4617..074a52d7 100644
--- a/lib/UserInterface/textinput/StreamReaderWin.h
+++ b/lib/UserInterface/textinput/StreamReaderWin.h
@@ -31,6 +31,8 @@ namespace textinput {
     bool HavePendingInput(bool wait);
     bool ReadInput(size_t& nRead, InputData& in);
 
+    bool IsFromTTY() override { return fIsConsole; }
+
   private:
     void HandleError(const char* Where) const;
     void HandleKeyEvent(unsigned char C, InputData& in);