diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0fa01029..7cebd030 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -132,7 +132,7 @@ jobs:
       CONF_FLAGS_amd64_max: "--enable-ibus --enable-ipv6 --enable-jpeg --enable-fuse
                   --enable-mp3lame --enable-fdkaac --enable-opus --enable-rfxcodec
                   --enable-painter --enable-pixman --enable-utmp
-                  --with-imlib2 --with-freetype2 --enable-tests"
+                  --with-imlib2 --with-freetype2 --enable-tests --with-x264"
       CONF_FLAGS_i386_max: "--enable-ibus --enable-ipv6 --enable-jpeg
                   --enable-mp3lame --enable-opus --enable-rfxcodec
                   --enable-painter --disable-pixman --with-imlib2
diff --git a/scripts/install_xrdp_build_dependencies_with_apt.sh b/scripts/install_xrdp_build_dependencies_with_apt.sh
index e4f685b9..d41be898 100755
--- a/scripts/install_xrdp_build_dependencies_with_apt.sh
+++ b/scripts/install_xrdp_build_dependencies_with_apt.sh
@@ -97,7 +97,8 @@ in
                     libibus-1.0-dev \
                     libimlib2-dev \
                     libopus-dev \
-                    libpixman-1-dev"
+                    libpixman-1-dev \
+                    libx264-dev"
                 ;;
             *)
                 echo "unsupported feature set: $FEATURE_SET"