diff --git a/packages/emacs/build.sh b/packages/emacs/build.sh
index 5ce8775672..fe1fd1a577 100644
--- a/packages/emacs/build.sh
+++ b/packages/emacs/build.sh
@@ -2,6 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://www.gnu.org/software/emacs/
 TERMUX_PKG_DESCRIPTION="Extensible, customizable text editor-and more"
 TERMUX_PKG_LICENSE="GPL-3.0"
 TERMUX_PKG_MAINTAINER="@termux"
+# Update both emacs and emacs-x to the same version in one PR.
 TERMUX_PKG_VERSION=28.2
 TERMUX_PKG_REVISION=1
 TERMUX_PKG_SRCURL=https://ftp.gnu.org/gnu/emacs/emacs-${TERMUX_PKG_VERSION}.tar.xz
@@ -83,6 +84,13 @@ termux_step_post_get_source() {
 		termux_error_exit "Package '$TERMUX_PKG_NAME' is not safe for on-device builds."
 	fi
 
+	# Version guard
+	local ver_e=${TERMUX_PKG_VERSION#*:}
+	local ver_x=$(. $TERMUX_SCRIPTDIR/x11-packages/emacs-x/build.sh; echo ${TERMUX_PKG_VERSION#*:})
+	if [ "${ver_e}" != "${ver_x}" ]; then
+		termux_error_exit "Version mismatch between emacs and emacs-x."
+	fi
+
 	# XXX: We have to start with new host build each time
 	#      to avoid build error when cross compiling.
 	rm -Rf $TERMUX_PKG_HOSTBUILD_DIR
diff --git a/x11-packages/emacs-x/build.sh b/x11-packages/emacs-x/build.sh
index 13a785dc5a..ed0897e7ae 100644
--- a/x11-packages/emacs-x/build.sh
+++ b/x11-packages/emacs-x/build.sh
@@ -2,6 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://www.gnu.org/software/emacs/
 TERMUX_PKG_DESCRIPTION="Extensible, customizable text editor-and more"
 TERMUX_PKG_LICENSE="GPL-3.0"
 TERMUX_PKG_MAINTAINER="@termux"
+# Update both emacs and emacs-x to the same version in one PR.
 TERMUX_PKG_VERSION=28.2
 TERMUX_PKG_REVISION=2
 TERMUX_PKG_SRCURL=https://ftp.gnu.org/gnu/emacs/emacs-${TERMUX_PKG_VERSION}.tar.xz
@@ -75,6 +76,13 @@ termux_step_post_get_source() {
 		termux_error_exit "Package '$TERMUX_PKG_NAME' is not safe for on-device builds."
 	fi
 
+	# Version guard
+	local ver_e=$(. $TERMUX_SCRIPTDIR/packages/emacs/build.sh; echo ${TERMUX_PKG_VERSION#*:})
+	local ver_x=${TERMUX_PKG_VERSION#*:}
+	if [ "${ver_e}" != "${ver_x}" ]; then
+		termux_error_exit "Version mismatch between emacs and emacs-x."
+	fi
+
 	# XXX: We have to start with new host build each time
 	#      to avoid build error when cross compiling.
 	rm -Rf $TERMUX_PKG_HOSTBUILD_DIR