diff --git a/packages/mpv/build.sh b/packages/mpv/build.sh
index 884a41c800..d5f4f628d8 100644
--- a/packages/mpv/build.sh
+++ b/packages/mpv/build.sh
@@ -2,6 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://mpv.io/
 TERMUX_PKG_DESCRIPTION="Command-line media player"
 TERMUX_PKG_LICENSE="GPL-2.0"
 TERMUX_PKG_MAINTAINER="@termux"
+# Update both mpv and mpv-x to the same version in one PR.
 TERMUX_PKG_VERSION=0.35.0
 TERMUX_PKG_SRCURL=https://github.com/mpv-player/mpv/archive/v${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_SHA256=dc411c899a64548250c142bf1fa1aa7528f1b4398a24c86b816093999049ec00
@@ -30,6 +31,15 @@ TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
 -Dandroid-media-ndk=disabled
 "
 
+termux_step_post_get_source() {
+	# Version guard
+	local ver_m=${TERMUX_PKG_VERSION#*:}
+	local ver_x=$(. $TERMUX_SCRIPTDIR/x11-packages/mpv-x/build.sh; echo ${TERMUX_PKG_VERSION#*:})
+	if [ "${ver_m}" != "${ver_x}" ]; then
+		termux_error_exit "Version mismatch between mpv and mpv-x."
+	fi
+}
+
 termux_step_pre_configure() {
 	LDFLAGS+=" -landroid-glob"
 }
diff --git a/x11-packages/mpv-x/build.sh b/x11-packages/mpv-x/build.sh
index cd3f142302..4aa05c44a7 100644
--- a/x11-packages/mpv-x/build.sh
+++ b/x11-packages/mpv-x/build.sh
@@ -3,6 +3,7 @@ TERMUX_PKG_DESCRIPTION="Command-line media player"
 # License: GPL-2.0-or-later
 TERMUX_PKG_LICENSE="GPL-2.0"
 TERMUX_PKG_MAINTAINER="@termux"
+# Update both mpv and mpv-x to the same version in one PR.
 TERMUX_PKG_VERSION=0.35.0
 TERMUX_PKG_SRCURL=https://github.com/mpv-player/mpv/archive/v${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_SHA256=dc411c899a64548250c142bf1fa1aa7528f1b4398a24c86b816093999049ec00
@@ -25,6 +26,15 @@ TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
 -Dandroid-media-ndk=disabled
 "
 
+termux_step_post_get_source() {
+	# Version guard
+	local ver_m=$(. $TERMUX_SCRIPTDIR/packages/mpv/build.sh; echo ${TERMUX_PKG_VERSION#*:})
+	local ver_x=${TERMUX_PKG_VERSION#*:}
+	if [ "${ver_m}" != "${ver_x}" ]; then
+		termux_error_exit "Version mismatch between mpv and mpv-x."
+	fi
+}
+
 termux_step_pre_configure() {
 	LDFLAGS+=" -landroid-glob -landroid-shmem"
 }