diff --git a/README.md b/README.md
index 3bbe651..fbf9504 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ families, including:
 - :construction: Register blocks for all peripherals
 - :x: DMA stream mappings
 - :x: Per-package pinouts
-- :x: Links to applicable reference manuals, datasheets, appnotes PDFs.
+- :heavy_check_mark: Links to applicable reference manuals, datasheets, appnotes PDFs.
 
 :heavy_check_mark: = done, :construction: = work in progress, :x: = to do
 
@@ -32,4 +32,4 @@ This generates all the YAMLs in `data/` except those in `data/registers/`, which
 
 ## Extracting new register blocks
 
-TODO document
\ No newline at end of file
+TODO document