diff --git a/src/tex2lyx/TODO.txt b/src/tex2lyx/TODO.txt
index ccfac851ff..f3d46de5ba 100644
--- a/src/tex2lyx/TODO.txt
+++ b/src/tex2lyx/TODO.txt
@@ -71,4 +71,12 @@ Format LaTeX feature                        LyX feature
 366    relative lengths for parskip         \defskip
 367    relative lengths for h and v space   InsetHSpace, InsetVSpace
 368    glue lengths                         InsetHSpace
+369    author id                            \author
+370    \date{}                              \suppress_date
+371    automatic mhchem loading             \use_mhchem
+372    font encoding                        \fontencoding
+375    \includeonly                         \{begin,end}_includeonly
+376    update .aux of unincluded children   \maintain_unincluded_children
+377    multirow.sty                         InsetTabular
+378    revision info                        InsetInfo
 
diff --git a/src/tex2lyx/preamble.cpp b/src/tex2lyx/preamble.cpp
index de58439643..bc42a3d4fb 100644
--- a/src/tex2lyx/preamble.cpp
+++ b/src/tex2lyx/preamble.cpp
@@ -198,6 +198,7 @@ string h_papersize               = "default";
 string h_use_geometry            = "false";
 string h_use_amsmath             = "1";
 string h_use_esint               = "1";
+string h_use_mhchem              = "0";
 string h_cite_engine             = "basic";
 string h_use_bibtopic            = "false";
 string h_paperorientation        = "portrait";
@@ -500,6 +501,9 @@ void handle_package(Parser &p, string const & name, string const & opts,
 	else if (name == "esint")
 		h_use_esint = "2";
 
+	else if (name == "mhchem")
+		h_use_mhchem = "2";
+
 	else if (name == "babel" && !opts.empty()) {
 		// check if more than one option was used - used later for inputenc
 		// in case inputenc is parsed before babel, set the encoding to auto
@@ -719,6 +723,7 @@ void end_preamble(ostream & os, TextClass const & /*textclass*/)
 	   << "\\use_geometry " << h_use_geometry << "\n"
 	   << "\\use_amsmath " << h_use_amsmath << "\n"
 	   << "\\use_esint " << h_use_esint << "\n"
+	   << "\\use_mhchem " << h_use_mhchem << "\n"
 	   << "\\cite_engine " << h_cite_engine << "\n"
 	   << "\\use_bibtopic " << h_use_bibtopic << "\n"
 	   << "\\paperorientation " << h_paperorientation << '\n';
diff --git a/src/tex2lyx/tex2lyx.h b/src/tex2lyx/tex2lyx.h
index 480e644fb6..3b09e14db4 100644
--- a/src/tex2lyx/tex2lyx.h
+++ b/src/tex2lyx/tex2lyx.h
@@ -165,7 +165,7 @@ extern bool noweb_mode;
 /// Did we recognize any pdflatex-only construct?
 extern bool pdflatex;
 /// LyX format that is created by tex2lyx
-int const LYX_FORMAT = 368;
+int const LYX_FORMAT = 378;
 
 /// path of the master .tex file
 extern std::string getMasterFilePath();