diff --git a/.github/workflows/wheels-dependencies.sh b/.github/workflows/wheels-dependencies.sh
index d33eaa652..5fa817636 100755
--- a/.github/workflows/wheels-dependencies.sh
+++ b/.github/workflows/wheels-dependencies.sh
@@ -120,6 +120,8 @@ function build_libavif {
     local out_dir=$(fetch_unpack https://github.com/AOMediaCodec/libavif/archive/refs/tags/v$LIBAVIF_VERSION.tar.gz libavif-$LIBAVIF_VERSION.tar.gz)
     # CONFIG_AV1_DECODER=0 is a flag for libaom (included as a subproject of
     # libavif) to disable the compilation and inclusion of aom's AV1 decoder.
+    # CONFIG_AV1_HIGHBITDEPTH=0 is another flag for libaom that disables support
+    # for encoding high bit depth images.
     (cd $out_dir \
         && CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake \
             -DCMAKE_INSTALL_PREFIX=$BUILD_PREFIX \
@@ -130,6 +132,7 @@ function build_libavif {
             -DAVIF_LIBYUV=LOCAL \
             -DAVIF_CODEC_AOM=LOCAL \
             -DCONFIG_AV1_DECODER=0 \
+            -DCONFIG_AV1_HIGHBITDEPTH=0 \
             -DAVIF_CODEC_AOM_DECODE=OFF \
             -DAVIF_CODEC_DAV1D=LOCAL \
             -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=$lto \
diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index c45e2e6db..b725e118d 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -400,6 +400,7 @@ DEPS: dict[str, dict[str, Any]] = {
                 "-DAVIF_LIBYUV=LOCAL",
                 "-DAVIF_CODEC_AOM=LOCAL",
                 "-DCONFIG_AV1_DECODER=0",
+                "-DCONFIG_AV1_HIGHBITDEPTH=0",
                 "-DAVIF_CODEC_AOM_DECODE=OFF",
                 "-DAVIF_CODEC_DAV1D=LOCAL",
                 "-DCMAKE_POLICY_VERSION_MINIMUM=3.5",