diff --git a/Project.toml b/Project.toml
index ff8d8ce886..9dd107c933 100644
--- a/Project.toml
+++ b/Project.toml
@@ -46,7 +46,7 @@ MacroTools = "0.5"
 NaNMath = "0.3"
 RecursiveArrayTools = "2.3"
 Requires = "1.0"
-RuntimeGeneratedFunctions = "0.4"
+RuntimeGeneratedFunctions = "0.4.3"
 SafeTestsets = "0.0.1"
 SpecialFunctions = "0.7, 0.8, 0.9, 0.10, 1.0"
 StaticArrays = "0.10, 0.11, 0.12, 1.0"
diff --git a/src/build_function.jl b/src/build_function.jl
index 752f7e69ac..dc6ff3642b 100644
--- a/src/build_function.jl
+++ b/src/build_function.jl
@@ -100,6 +100,7 @@ end
 # Scalar output
 function _build_function(target::JuliaTarget, op, args...;
                          conv = toexpr, expression = Val{true},
+                         expression_module = @__MODULE__,
                          checkbounds = false,
                          linenumbers = true, headerfun=addheader)
 
@@ -127,12 +128,12 @@ function _build_function(target::JuliaTarget, op, args...;
     if expression == Val{true}
         return ModelingToolkit.inject_registered_module_functions(oop_ex)
     else
-        _build_and_inject_function(@__MODULE__, oop_ex)
+        _build_and_inject_function(expression_module, oop_ex)
     end
 end
 
 function _build_and_inject_function(mod::Module, ex)
-	@RuntimeGeneratedFunction(ModelingToolkit.inject_registered_module_functions(ex))
+	@RuntimeGeneratedFunction(mod, ModelingToolkit.inject_registered_module_functions(ex))
 end
 
 # Detect heterogeneous element types of "arrays of matrices/sparce matrices"
@@ -218,6 +219,7 @@ Special Keyword Argumnets:
 """
 function _build_function(target::JuliaTarget, rhss::AbstractArray, args...;
                          conv = toexpr, expression = Val{true},
+                         expression_module = @__MODULE__,
                          checkbounds = false,
                          linenumbers = false, multithread=nothing,
                          headerfun = addheader, outputidxs=nothing,
@@ -457,7 +459,7 @@ function _build_function(target::JuliaTarget, rhss::AbstractArray, args...;
     if expression == Val{true}
         return ModelingToolkit.inject_registered_module_functions(oop_ex), ModelingToolkit.inject_registered_module_functions(iip_ex)
     else
-        return _build_and_inject_function(@__MODULE__, oop_ex), _build_and_inject_function(@__MODULE__, iip_ex)
+        return _build_and_inject_function(expression_module, oop_ex), _build_and_inject_function(expression_module, iip_ex)
     end
 end
 
diff --git a/src/systems/diffeqs/abstractodesystem.jl b/src/systems/diffeqs/abstractodesystem.jl
index 388ad9c3de..a38b2a343d 100644
--- a/src/systems/diffeqs/abstractodesystem.jl
+++ b/src/systems/diffeqs/abstractodesystem.jl
@@ -124,19 +124,20 @@ function DiffEqBase.ODEFunction{iip}(sys::AbstractODESystem, dvs = states(sys),
                                      version = nothing, tgrad=false,
                                      jac = false,
                                      eval_expression = true,
+                                     eval_module = @__MODULE__,
                                      sparse = false, simplify = true,
                                      kwargs...) where {iip}
 
-    f_gen = generate_function(sys, dvs, ps; expression=Val{eval_expression}, kwargs...)
-    f_oop,f_iip = eval_expression ? (@RuntimeGeneratedFunction(ex) for ex in f_gen) : f_gen
+    f_gen = generate_function(sys, dvs, ps; expression=Val{eval_expression}, expression_module=eval_module, kwargs...)
+    f_oop,f_iip = eval_expression ? (@RuntimeGeneratedFunction(eval_module, ex) for ex in f_gen) : f_gen
     f(u,p,t) = f_oop(u,p,t)
     f(du,u,p,t) = f_iip(du,u,p,t)
 
     if tgrad
         tgrad_gen = generate_tgrad(sys, dvs, ps;
                                    simplify=simplify,
-                                   expression=Val{eval_expression}, kwargs...)
-        tgrad_oop,tgrad_iip = eval_expression ? (@RuntimeGeneratedFunction(ex) for ex in tgrad_gen) : tgrad_gen
+                                   expression=Val{eval_expression}, expression_module=eval_module, kwargs...)
+        tgrad_oop,tgrad_iip = eval_expression ? (@RuntimeGeneratedFunction(eval_module, ex) for ex in tgrad_gen) : tgrad_gen
         _tgrad(u,p,t) = tgrad_oop(u,p,t)
         _tgrad(J,u,p,t) = tgrad_iip(J,u,p,t)
     else
@@ -146,8 +147,8 @@ function DiffEqBase.ODEFunction{iip}(sys::AbstractODESystem, dvs = states(sys),
     if jac
         jac_gen = generate_jacobian(sys, dvs, ps;
                                     simplify=simplify, sparse = sparse,
-                                    expression=Val{eval_expression}, kwargs...)
-        jac_oop,jac_iip = eval_expression ? (@RuntimeGeneratedFunction(ex) for ex in jac_gen) : jac_gen
+                                    expression=Val{eval_expression}, expression_module=eval_module, kwargs...)
+        jac_oop,jac_iip = eval_expression ? (@RuntimeGeneratedFunction(eval_module, ex) for ex in jac_gen) : jac_gen
         _jac(u,p,t) = jac_oop(u,p,t)
         _jac(J,u,p,t) = jac_iip(J,u,p,t)
     else
diff --git a/test/precompile_test.jl b/test/precompile_test.jl
new file mode 100644
index 0000000000..61abebe55e
--- /dev/null
+++ b/test/precompile_test.jl
@@ -0,0 +1,26 @@
+using Test
+using ModelingToolkit
+
+# Test that the precompiled ODE system works
+push!(LOAD_PATH, joinpath(@__DIR__, "precompile_test"))
+using ODEPrecompileTest
+
+u  = collect(1:3)
+p  = collect(4:6)
+
+# This case does not work, because "f_bad" gets defined in ModelingToolkit
+# instead of in the compiled module!
+@test parentmodule(typeof(ODEPrecompileTest.f_bad.f.f_iip).parameters[2]) == ModelingToolkit
+@test parentmodule(typeof(ODEPrecompileTest.f_bad.f.f_oop).parameters[2]) == ModelingToolkit
+@test parentmodule(typeof(ODEPrecompileTest.f_noeval_bad.f.f_iip).parameters[2]) == ModelingToolkit
+@test parentmodule(typeof(ODEPrecompileTest.f_noeval_bad.f.f_oop).parameters[2]) == ModelingToolkit
+@test_throws KeyError ODEPrecompileTest.f_bad(u, p, 0.1)
+@test_throws KeyError ODEPrecompileTest.f_noeval_bad(u, p, 0.1)
+
+# This case works, because "f_good" gets defined in the precompiled module.
+@test parentmodule(typeof(ODEPrecompileTest.f_good.f.f_iip).parameters[2]) == ODEPrecompileTest
+@test parentmodule(typeof(ODEPrecompileTest.f_good.f.f_oop).parameters[2]) == ODEPrecompileTest
+@test parentmodule(typeof(ODEPrecompileTest.f_noeval_good.f.f_iip).parameters[2]) == ODEPrecompileTest
+@test parentmodule(typeof(ODEPrecompileTest.f_noeval_good.f.f_oop).parameters[2]) == ODEPrecompileTest
+@test ODEPrecompileTest.f_good(u, p, 0.1) == [4, 0, -16]
+@test ODEPrecompileTest.f_noeval_good(u, p, 0.1) == [4, 0, -16]
\ No newline at end of file
diff --git a/test/precompile_test/ODEPrecompileTest.jl b/test/precompile_test/ODEPrecompileTest.jl
new file mode 100644
index 0000000000..453cb0d774
--- /dev/null
+++ b/test/precompile_test/ODEPrecompileTest.jl
@@ -0,0 +1,32 @@
+module ODEPrecompileTest
+    using ModelingToolkit
+
+    function system(; kwargs...)
+        # Define some variables
+        @parameters t σ ρ β
+        @variables x(t) y(t) z(t)
+        @derivatives D'~t
+
+        # Define a differential equation
+        eqs = [D(x) ~ σ*(y-x),
+            D(y) ~ x*(ρ-z)-y,
+            D(z) ~ x*y - β*z]
+
+        de = ODESystem(eqs)
+        return ODEFunction(de, [x,y,z], [σ,ρ,β]; kwargs...)
+    end
+    
+    # Build an ODEFunction as part of the module's precompilation. This case
+    # will not work, because the generated RGFs will be put into
+    # ModelingToolkit's RGF cache.
+    const f_bad = system()
+
+    # This case will work, because it will be put into our own module's cache.
+    using RuntimeGeneratedFunctions
+    RuntimeGeneratedFunctions.init(@__MODULE__)
+    const f_good = system(; eval_module=@__MODULE__)
+
+    # Also test that eval_expression=false works
+    const f_noeval_bad = system(; eval_expression=false)
+    const f_noeval_good = system(; eval_expression=false, eval_module=@__MODULE__)
+end
\ No newline at end of file
diff --git a/test/runtests.jl b/test/runtests.jl
index 5ad02512c9..0049c05ec1 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -33,3 +33,4 @@ using SafeTestsets, Test
 println("Last test requires gcc available in the path!")
 @safetestset "C Compilation Test" begin include("ccompile.jl") end
 @safetestset "Latexify recipes Test" begin include("latexify.jl") end
+@safetestset "Precompiled Modules Test" begin include("precompile_test.jl") end