diff --git a/src/ReactionNetworkImporters.jl b/src/ReactionNetworkImporters.jl
index bdee84e..4de6c94 100644
--- a/src/ReactionNetworkImporters.jl
+++ b/src/ReactionNetworkImporters.jl
@@ -45,7 +45,6 @@ export BNGNetwork, MatrixNetwork, ParsedReactionNetwork, ComplexMatrixNetwork
 # parsers
 include("parsing_routines_bngnetworkfiles.jl")
 include("parsing_routines_matrixnetworks.jl")
-include("u0_index_change.jl")
 
 export loadrxnetwork