diff --git a/src/solvers/newton.jl b/src/solvers/newton.jl
index d38a902..aca9df5 100644
--- a/src/solvers/newton.jl
+++ b/src/solvers/newton.jl
@@ -43,7 +43,7 @@ function newton_{T}(df::OnceDifferentiable,
     xold = similar(x)
     p = Array{T}(n)
     g = Array{T}(n)
-    value_jacobian!(df, x)
+    value_jacobian!!(df, x)
 
     check_isfinite(value(df))
 
diff --git a/src/solvers/trust_region.jl b/src/solvers/trust_region.jl
index a562bb4..4f89ada 100644
--- a/src/solvers/trust_region.jl
+++ b/src/solvers/trust_region.jl
@@ -99,7 +99,7 @@ function trust_region_{T}(df::OnceDifferentiable,
     p = similar(x)          # Step
     d = similar(x)          # Scaling vector
 
-    value_jacobian!(df, x)
+    value_jacobian!!(df, x)
     r .= value(df)
     check_isfinite(r)