diff --git a/src/overlapping/abstract.jl b/src/overlapping/abstract.jl
index af4c521449a36e0c3c4c20b263c9ccb7e3f7a4a7..4ba9a2d124916b0da77097440484285c01f64567 100644
--- a/src/overlapping/abstract.jl
+++ b/src/overlapping/abstract.jl
@@ -1,6 +1,6 @@
 module Abstract
 
-import ...BuildingBlocks: BuildingBlock, ContainerBlock, RFPulseBlock
+import ...BuildingBlocks: BuildingBlock, ContainerBlock, RFPulseBlock, get_children_indices
 import ...Wait: WaitBlock
 import ...Readouts: InstantReadout
 import ...Gradients: GradientBlock, split_gradient