diff --git a/src/Platform/Unix/Pipe.cpp b/src/Platform/Unix/Pipe.cpp
index 7b2950ff..bdae238d 100644
--- a/src/Platform/Unix/Pipe.cpp
+++ b/src/Platform/Unix/Pipe.cpp
@@ -36,9 +36,15 @@ namespace VeraCrypt
 	void Pipe::Close ()
 	{
 		if (ReadFileDescriptor != -1)
+		{
 			close (ReadFileDescriptor);
+			ReadFileDescriptor = -1;
+		}
 		if (WriteFileDescriptor != -1)
+		{
 			close (WriteFileDescriptor);
+			WriteFileDescriptor = -1;
+		}
 	}
 
 	int Pipe::GetReadFD ()