diff --git a/src/overlapping/gradient_pulses/spoilt_slice_selects.jl b/src/overlapping/gradient_pulses/spoilt_slice_selects.jl
index e467c9fe11827f1ed8e5b97138d0bac8add425f5..d77bd645c5df6823995a4ad26d32ea529a5848cb 100644
--- a/src/overlapping/gradient_pulses/spoilt_slice_selects.jl
+++ b/src/overlapping/gradient_pulses/spoilt_slice_selects.jl
@@ -5,7 +5,7 @@ import StaticArrays: SVector
 import JuMP: @variable, @constraint, @objective, objective_function
 import ....BuildingBlocks: RFPulseBlock, set_simple_constraints!
 import ....BuildSequences: global_model, global_scanner
-import ....Variables: VariableType, variables, duration, rise_time, flat_time, effective_time, qvec, gradient_strength, slew_rate
+import ....Variables: VariableType, variables, duration, rise_time, flat_time, effective_time, qvec, gradient_strength, slew_rate, inverse_slice_thickness
 import ....Gradients: ChangingGradientBlock, ConstantGradientBlock
 import ...Abstract: interruptions, waveform, AbstractOverlapping