diff --git a/src/build_sequences.jl b/src/build_sequences.jl
index 0f48d8d386189992f9320fc10f9a6babfd5e487f..1d2460a712f111139ac235ac1f152ae17529b593 100644
--- a/src/build_sequences.jl
+++ b/src/build_sequences.jl
@@ -2,7 +2,7 @@ module BuildSequences
 import JuMP: Model, optimizer_with_attributes, optimize!, AbstractJuMPScalar, value, solution_summary, termination_status, LOCALLY_SOLVED, OPTIMAL, num_variables
 import Ipopt
 import Juniper
-import ..Scanners: Scanner
+import ..Scanners: Scanner, gradient_strength
 
 const GLOBAL_MODEL = Ref(Model())
 const IGNORE_MODEL = GLOBAL_MODEL[]