diff --git a/anglerfish/config/adaptors.yaml b/anglerfish/config/adaptors.yaml
index 94f815e..b3d46c3 100644
--- a/anglerfish/config/adaptors.yaml
+++ b/anglerfish/config/adaptors.yaml
@@ -2,6 +2,10 @@
 # The position of an index within an adaptor is represented by the delimiter "-NNN-".
 # The indexes themselves are represented in the sample sheet.
 
+illumina_ud:
+  i5: AATGATACGGCGACCACCGAGATCTACAC-NNN-TCGTCGGCAGCGTC
+  i7: CAAGCAGAAGACGGCATACGAGAT-NNN-GTCTCGTGGGCTCGG
+
 truseq:
   i5: AATGATACGGCGACCACCGAGATCTACACTCTTTCCCTACACGACGCTCTTCCGATCT
   i7: GATCGGAAGAGCACACGTCTGAACTCCAGTCAC-NNN-ATCTCGTATGCCGTCTTCTGCTTG