diff --git a/src/printing.jl b/src/printing.jl
index 8295cc0107179136427d0353fc08db7d968d2aa6..367d787c5086d7bdc5fb3fec6f804a594a52f5ed 100644
--- a/src/printing.jl
+++ b/src/printing.jl
@@ -5,7 +5,7 @@ import ..BuildingBlocks: BuildingBlock, get_children_indices, VariableNotAvailab
 import ..Alternatives: AlternativeBlocks
 import ..Overlapping: AbstractOverlapping, waveform, interruptions
 import ..Sequences: Sequence
-import ..Variables: VariableType, duration, start_time, variables, alternative_variables, effective_time
+import ..Variables: VariableType, duration, start_time, variables, alternative_variables, effective_time, flip_angle
 import ..Pulses: GenericPulse
 
 struct BuildingBlockPrinter{T<:BuildingBlock}