diff --git a/src/main/scala/com/fulcrumgenomics/umi/GroupReadsByUmi.scala b/src/main/scala/com/fulcrumgenomics/umi/GroupReadsByUmi.scala
index 32f0e506b..631fb8b35 100644
--- a/src/main/scala/com/fulcrumgenomics/umi/GroupReadsByUmi.scala
+++ b/src/main/scala/com/fulcrumgenomics/umi/GroupReadsByUmi.scala
@@ -440,7 +440,7 @@ object Strategy extends FgBioEnum[Strategy] {
     |   4. Read Name
     |
     |During grouping, reads are filtered out if a) all reads with the same queryname are unmapped, b) any primary
-    |read has mapping quality < `min-map-q` (default=1), or c) the primary mappings for R1 and R1 are on different
+    |read has mapping quality < `min-map-q` (default=1), or c) the primary mappings for R1 and R2 are on different
     |chromosomes and `--allow-inter-contig` has been set to false.
     |
     |Grouping of UMIs is performed by one of four strategies: