diff --git a/qctoolkit/_program/_loop.py b/qctoolkit/_program/_loop.py
index ddb4cce6a..6cbbd8be3 100644
--- a/qctoolkit/_program/_loop.py
+++ b/qctoolkit/_program/_loop.py
@@ -15,8 +15,7 @@
 from qctoolkit.utils.types import MeasurementWindow
 from qctoolkit.utils import is_integer
 
-from qctoolkit.pulses.sequence_pulse_template import SequenceWaveform
-from qctoolkit.pulses.repetition_pulse_template import RepetitionWaveform
+from qctoolkit._program.waveforms import SequenceWaveform, RepetitionWaveform
 
 __all__ = ['Loop', 'MultiChannelProgram', 'make_compatible']