diff --git a/src/tex2lyx/Preamble.h b/src/tex2lyx/Preamble.h
index 91f3a4882f..ae5886e08e 100644
--- a/src/tex2lyx/Preamble.h
+++ b/src/tex2lyx/Preamble.h
@@ -37,6 +37,8 @@ public:
 	///
 	std::string inputencoding() const { return h_inputencoding; }
 	///
+	void setInputencoding(std::string const & e) { h_inputencoding = e; }
+	///
 	std::string notefontcolor() const { return h_notefontcolor; }
 	///
 	bool refstyle() const { return h_use_refstyle; }
diff --git a/src/tex2lyx/tex2lyx.cpp b/src/tex2lyx/tex2lyx.cpp
index 9e3257cf73..c3cf99acb6 100644
--- a/src/tex2lyx/tex2lyx.cpp
+++ b/src/tex2lyx/tex2lyx.cpp
@@ -788,14 +788,6 @@ bool roundtripMode()
 }
 
 
-string fixedEncoding()
-{
-	if (fixed_encoding)
-		return default_encoding;
-	return "";
-}
-
-
 namespace {
 
 /*!
@@ -1064,6 +1056,8 @@ int main(int argc, char * argv[])
 		if (!enc)
 			error_message("Unknown LaTeX encoding `" + default_encoding + "'");
 		default_encoding = enc->iconvName();
+		if (fixed_encoding)
+			preamble.setInputencoding(enc->name());
 	}
 
 	// Load the layouts
diff --git a/status.21x b/status.21x
index a8da9d48e0..8470f2ecbf 100644
--- a/status.21x
+++ b/status.21x
@@ -102,6 +102,8 @@ What's new
 
 * TEX2LYX
 
+- Write fixed encoding to LyX file if -fixedenc was given (bug 9178).
+