diff --git a/src/network_analysis.jl b/src/network_analysis.jl
index 1ece746fa..8610b60c9 100644
--- a/src/network_analysis.jl
+++ b/src/network_analysis.jl
@@ -877,6 +877,7 @@ function cache_conservationlaw_eqs!(rn::ReactionSystem, N::AbstractMatrix, col_o
     nps.depspecs = Set(depspecs)
     nps.conservedeqs = conservedeqs
     nps.constantdefs = constantdefs
+    nps.conservedconst = constants
 
     nothing
 end
diff --git a/src/reactionsystem.jl b/src/reactionsystem.jl
index a2cd0ecf2..01be8f6e9 100644
--- a/src/reactionsystem.jl
+++ b/src/reactionsystem.jl
@@ -86,6 +86,7 @@ Base.@kwdef mutable struct NetworkProperties{I <: Integer, V <: BasicSymbolic{Re
     depspecs::Set{V} = Set{V}()
     conservedeqs::Vector{Equation} = Equation[]
     constantdefs::Vector{Equation} = Equation[]
+    conservedconst::BasicSymbolic{Real} = only(@parameters __UNINITIALIZED)
     speciesmap::Dict{V, Int} = Dict{V, Int}()
     complextorxsmap::OrderedDict{ReactionComplex{Int}, Vector{Pair{Int, Int}}} = OrderedDict{ReactionComplex{Int},Vector{Pair{Int,Int}}}()
     complexes::Vector{ReactionComplex{Int}} = Vector{ReactionComplex{Int}}(undef, 0)
@@ -126,6 +127,7 @@ function reset!(nps::NetworkProperties{I, V}) where {I, V}
     empty!(nps.col_order)
     nps.rank = 0
     nps.nullity = 0
+    nps.conservedconst = only(@parameters __UNINITIALIZED)
     empty!(nps.indepspecs)
     empty!(nps.depspecs)
     empty!(nps.conservedeqs)
diff --git a/src/reactionsystem_conversions.jl b/src/reactionsystem_conversions.jl
index aa5a17fed..470e7e847 100644
--- a/src/reactionsystem_conversions.jl
+++ b/src/reactionsystem_conversions.jl
@@ -392,11 +392,8 @@ function addconstraints!(eqs, rs::ReactionSystem, ists, ispcs; remove_conserved
         nps = get_networkproperties(rs)
 
         # add the conservation constants as parameters and set their values
-        ps = vcat(ps, collect(eq.lhs for eq in nps.constantdefs))
+        ps = push!(ps, nps.conservedconst)
         defs = copy(MT.defaults(rs))
-        # for eq in nps.constantdefs
-        #     defs[eq.lhs] = eq.rhs
-        # end
 
         # add the dependent species as observed
         obs = copy(MT.observed(rs))