diff --git a/Project.toml b/Project.toml
index 0acef1a..4d12599 100644
--- a/Project.toml
+++ b/Project.toml
@@ -14,4 +14,4 @@ RuntimeGeneratedFunctions = "7e49a35a-f44a-4d26-94aa-eba1b4ca6b47"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 
 [compat]
-Catalyst = "6.11, 7, 8"
+Catalyst = "6.12, 7, 8"
diff --git a/src/fspsystem.jl b/src/fspsystem.jl
index 673244e..9c00de5 100644
--- a/src/fspsystem.jl
+++ b/src/fspsystem.jl
@@ -1,7 +1,5 @@
 import AbstractAlgebra
 
-netstoichmat(rs::ReactionSystem) = prodstoichmat(rs) - substoichmat(rs)
-
 """ 
     struct FSPSystem{IHT <: AbstractIndexHandler}
         rs::ReactionSystem