diff --git a/src/stdatamodels/jwst/datamodels/schemas/specwcs_miri_lrs.schema.yaml b/src/stdatamodels/jwst/datamodels/schemas/specwcs_miri_lrs.schema.yaml
index de4dd098..14b8dfe1 100644
--- a/src/stdatamodels/jwst/datamodels/schemas/specwcs_miri_lrs.schema.yaml
+++ b/src/stdatamodels/jwst/datamodels/schemas/specwcs_miri_lrs.schema.yaml
@@ -66,23 +66,19 @@ allOf:
       properties:
         x_ref:
           type: number
-          title: x coord of ref position of MIRIM_SLIT
-          units: pixels
+          title:  x coord in pixels of ref position of MIRIM_SLIT
           fits_keyword: IMX
         y_ref:
           type: number
-          title: y coord of ref position of MIRIM_SLIT
-          units: pixels
+          title: y coord in pixels in pixel  of ref position of MIRIM_SLIT
           fits_keyword: IMY
         x_ref_slitless:
           type: number
-          title: x coord of ref position of MIRIM_SLITLESS
-          units: pixels
+          title: x coord in pixel of ref position of MIRIM_SLITLESS
           fits_keyword: IMXSLTL
         y_ref_slitless:
           type: number
-          title: y coord of ref position of MIRIM_SLITLESS
-          units: pixels
+          title: y coord in pixels of ref position of MIRIM_SLITLESS
           fits_keyword: IMYSLTL
         v2_vert1:
           type: number