diff --git a/QGL/drivers/APS2Pattern.py b/QGL/drivers/APS2Pattern.py
index 863e78ae..f5ff31de 100644
--- a/QGL/drivers/APS2Pattern.py
+++ b/QGL/drivers/APS2Pattern.py
@@ -1188,7 +1188,7 @@ def start_new_seq():
         for i in range(num_chans):
             wf_len = struct.unpack('<Q', FID.read(8))[0]
             wf_dat = np.frombuffer(FID.read(2*wf_len), dtype=np.int16)
-            wf_lif[f'ch{i+1}'] = ( 1.0 / MAX_WAVEFORM_VALUE) * wf_dat.flatten()
+            wf_lib[f'ch{i+1}'] = ( 1.0 / MAX_WAVEFORM_VALUE) * wf_dat.flatten()
 
         NUM_NCO = 2
         freq = np.zeros(NUM_NCO)  #radians per timestep