diff --git a/src/variables.jl b/src/variables.jl
index 1fbacf6060e782d8718da0746bebd8e379d71d2b..a6ef192f336d9b3c1c3bd2a3ae1a88cd5348bffa 100644
--- a/src/variables.jl
+++ b/src/variables.jl
@@ -1,5 +1,6 @@
 module Variables
 import JuMP: @variable, Model, @objective, objective_function, owner_model, has_values, value, AbstractJuMPScalar
+import LinearAlgebra: norm
 import ..Scanners: gradient_strength, slew_rate
 
 all_variables_symbols = [