diff --git a/docs/src/api.md b/docs/src/api.md
index 45266df8..9634d1c7 100644
--- a/docs/src/api.md
+++ b/docs/src/api.md
@@ -4,6 +4,7 @@
 ```@docs
 SymbolicUtils.@syms
 SymbolicUtils.Sym
+SymbolicUtils.issym
 SymbolicUtils.symtype
 SymbolicUtils.Term
 SymbolicUtils.Add
diff --git a/docs/src/manual/interface.md b/docs/src/manual/interface.md
index 601bdaaa..285ed76b 100644
--- a/docs/src/manual/interface.md
+++ b/docs/src/manual/interface.md
@@ -10,11 +10,3 @@ In particular, you should define methods from TermInterface.jl for an expression
 with SymbolicUtils.jl
 
 You can read the documentation of [TermInterface.jl](https://github.com/JuliaSymbolics/TermInterface.jl) on the [Github repository](https://github.com/JuliaSymbolics/TermInterface.jl).
-
-## SymbolicUtils.jl only methods
-
-```@docs
-symtype
-issym
-promote_symtype
-```