diff --git a/scripts/circleci/build.sh b/scripts/circleci/build.sh
index 5281af30e6fb8..f186f7674f483 100755
--- a/scripts/circleci/build.sh
+++ b/scripts/circleci/build.sh
@@ -2,6 +2,11 @@
 		
 set -e		
 
+# Update the local size measurements to the master version
+# so that the size diff printed at the end of the build is
+# accurate.
+curl -o scripts/rollup/results.json http://react.zpao.com/builds/master/latest/results.json
+
 yarn build --extract-errors
 # Note: since we run the full build including extracting error codes,
 # it is important that we *don't* reset the change to `scripts/error-codes/codes.json`.