diff --git a/Project.toml b/Project.toml
index 554929177..92516b8b4 100644
--- a/Project.toml
+++ b/Project.toml
@@ -26,6 +26,7 @@ Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
 NaNMath = "77ba4419-2d1f-58cd-9bb1-8ffee604a2e3"
 PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
 RecipesBase = "3cdcf5f2-1ef4-517c-9805-6587b60abb01"
+RecursiveArrayTools = "731186ca-8d62-57ce-b412-fbd966d074cd"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 RuntimeGeneratedFunctions = "7e49a35a-f44a-4d26-94aa-eba1b4ca6b47"
@@ -63,6 +64,7 @@ MacroTools = "0.5"
 NaNMath = "0.3, 1"
 PrecompileTools = "1"
 RecipesBase = "1.1"
+RecursiveArrayTools = "2"
 Reexport = "0.2, 1"
 ReferenceTests = "0.9"
 Requires = "1.1"
diff --git a/src/num.jl b/src/num.jl
index 5859ed606..6646e8e6e 100644
--- a/src/num.jl
+++ b/src/num.jl
@@ -197,3 +197,6 @@ function Base.Docs.getdoc(x::Num)
     end
     Markdown.parse(join(strings, "\n\n  "))
 end
+
+using RecursiveArrayTools
+RecursiveArrayTools.issymbollike(::Union{BasicSymbolic,Num}) = true
diff --git a/test/overloads.jl b/test/overloads.jl
index 7218467e6..474218554 100644
--- a/test/overloads.jl
+++ b/test/overloads.jl
@@ -167,7 +167,7 @@ z2 = c + d * im
 @test sign(Num(1)) isa Num
 @test isequal(sign(Num(1)), Num(1))
 @test isequal(sign(Num(-1)), Num(-1))
-                    
+
 @test isequal(ℯ^a, exp(a))
 
 using IfElse: ifelse
@@ -237,3 +237,6 @@ for f in [<, <=, >, >=, isless]
 end
 
 @test_nowarn binomial(t, 1)
+
+using RecursiveArrayTools
+@test RecursiveArrayTools.issymbollike(t)