diff --git a/qsirecon/data/scalars/dipy_dki.yaml b/qsirecon/data/scalars/dipy_dki.yaml
index 9cb5a644..e61dd2ac 100644
--- a/qsirecon/data/scalars/dipy_dki.yaml
+++ b/qsirecon/data/scalars/dipy_dki.yaml
@@ -4,6 +4,7 @@ dki_ad:
         param: ad
     metadata:
         Description: DKI axial diffusivity
+        Units: μm^2/ms
 dki_ak:
     bids:
         model: dki
diff --git a/qsirecon/data/scalars/dsistudio_gqi.yaml b/qsirecon/data/scalars/dsistudio_gqi.yaml
index 45d37c01..878c51db 100644
--- a/qsirecon/data/scalars/dsistudio_gqi.yaml
+++ b/qsirecon/data/scalars/dsistudio_gqi.yaml
@@ -4,6 +4,7 @@ ad_file:
         param: ad
     metadata:
         Description: Axial Diffusivity from a tensor fit. The first eigenvalue of the tensor.
+        Units: mm^2/s
 dti_fa_file:
     bids:
         model: tensor