diff --git a/src/components/pulses/sinc_pulses.jl b/src/components/pulses/sinc_pulses.jl
index 9ffebfb229cbf24fe33026adeb7988a787711e8b..ad131e54b1998b49bf784d44606e7bc3f8e00fdc 100644
--- a/src/components/pulses/sinc_pulses.jl
+++ b/src/components/pulses/sinc_pulses.jl
@@ -2,7 +2,7 @@ module SincPulses
 import JuMP: @constraint
 import QuadGK: quadgk
 import ....BuildSequences: global_model
-import ....Variables: duration, amplitude, effective_time, flip_angle, phase, inverse_bandwidth, VariableType, set_simple_constraints!, frequency, make_generic
+import ....Variables: duration, amplitude, effective_time, flip_angle, phase, inverse_bandwidth, VariableType, set_simple_constraints!, frequency, make_generic, get_free_variable
 import ...AbstractTypes: RFPulseComponent
 import ..GenericPulses: GenericPulse