diff --git a/data/registers/sdmmc_v1.yaml b/data/registers/sdmmc_v1.yaml
index 1a678f9..06628b9 100644
--- a/data/registers/sdmmc_v1.yaml
+++ b/data/registers/sdmmc_v1.yaml
@@ -60,7 +60,7 @@ block/SDMMC:
     - name: MASKR
       description: mask register
       byte_offset: 60
-      fieldset: MASK
+      fieldset: MASKR
     - name: FIFOCNT
       description: FIFO counter register
       byte_offset: 72