diff --git a/Project.toml b/Project.toml
index d8ec44ac1..1651aab2a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "NonlinearSolve"
 uuid = "8913a72c-1f9b-4ce2-8d82-65094dcecaec"
 authors = ["SciML"]
-version = "3.15.0"
+version = "3.15.1"
 
 [deps]
 ADTypes = "47edcb42-4c32-4615-8424-f2b9edc5f35b"
diff --git a/src/internal/helpers.jl b/src/internal/helpers.jl
index afc24ce5b..5334f11dc 100644
--- a/src/internal/helpers.jl
+++ b/src/internal/helpers.jl
@@ -1,9 +1,8 @@
 # Evaluate the residual function at a given point
 function evaluate_f(prob::AbstractNonlinearProblem{uType, iip}, u) where {uType, iip}
-    (; f, u0, p) = prob
+    (; f, p) = prob
     if iip
-        fu = f.resid_prototype === nothing ? zero(u) :
-             promote_type(eltype(u), eltype(f.resid_prototype)).(f.resid_prototype)
+        fu = f.resid_prototype === nothing ? zero(u) : similar(f.resid_prototype)
         f(fu, u, p)
     else
         fu = f(u, p)
diff --git a/src/internal/jacobian.jl b/src/internal/jacobian.jl
index 390c0947f..b78eb7383 100644
--- a/src/internal/jacobian.jl
+++ b/src/internal/jacobian.jl
@@ -92,13 +92,11 @@ function JacobianCache(prob, alg, f::F, fu_, u, p; stats, autodiff = nothing,
                 end
             end
         else
-            jac_proto = if eltype(f.jac_prototype) <: Bool
+            if eltype(f.jac_prototype) <: Bool
                 similar(f.jac_prototype, promote_type(eltype(fu), eltype(u)))
             else
                 similar(f.jac_prototype)
             end
-            fill!(jac_proto, false)
-            jac_proto
         end
     end