diff --git a/tools/build-image/README.md b/tools/build-image/README.md
index 7c49791ace..dd2b73aa19 100644
--- a/tools/build-image/README.md
+++ b/tools/build-image/README.md
@@ -3,9 +3,10 @@
 The Grafana Alloy build images are used for CI workflows to manage builds of
 Grafana Alloy.
 
-There are two images:
+There are the following images:
 
 * `grafana/alloy-build-image:vX.Y.Z` (for building Linux containers)
+* `grafana/alloy-build-image:vX.Y.Z-boringcrypto` (for building Linux containers with boringcrypto)
 * `grafana/alloy-build-image:vX.Y.Z-windows` (for building Windows containers)
 
 (Where `X.Y.Z` is replaced with some semantic version, like 0.1.0).