diff --git a/doc/hooks/aws-c-common.section.md b/doc/hooks/aws-c-common.section.md
new file mode 100644
index 000000000000..c631f61589df
--- /dev/null
+++ b/doc/hooks/aws-c-common.section.md
@@ -0,0 +1,4 @@
+# `aws-c-common` {#aws-c-common}
+
+This hook exposes its own [CMake](#cmake) modules by setting [`CMAKE_MODULE_PATH`](https://cmake.org/cmake/help/latest/variable/CMAKE_MODULE_PATH.html) through [the `cmakeFlags` variable](#cmake-flags)
+to the nonstandard `$out/lib/cmake` directory, as a workaround for [an upstream bug](https://github.com/awslabs/aws-c-common/issues/844).
diff --git a/doc/hooks/index.md b/doc/hooks/index.md
index f4e05c2262ca..e4b744056c5e 100644
--- a/doc/hooks/index.md
+++ b/doc/hooks/index.md
@@ -8,6 +8,7 @@ The stdenv built-in hooks are documented in [](#ssec-setup-hooks).
 autoconf.section.md
 automake.section.md
 autopatchelf.section.md
+aws-c-common.section.md
 bmake.section.md
 breakpoint.section.md
 cernlib.section.md