diff --git a/packages/libnet/build.sh b/packages/libnet/build.sh
index 5dad63c3aa..8f32259901 100644
--- a/packages/libnet/build.sh
+++ b/packages/libnet/build.sh
@@ -7,3 +7,15 @@ TERMUX_PKG_REVISION=1
 TERMUX_PKG_SRCURL=https://github.com/libnet/libnet/releases/download/v$TERMUX_PKG_VERSION/libnet-$TERMUX_PKG_VERSION.tar.gz
 TERMUX_PKG_SHA256=caa4868157d9e5f32e9c7eac9461efeff30cb28357f7f6bf07e73933fb4edaa7
 TERMUX_PKG_AUTO_UPDATE=true
+
+termux_step_post_get_source() {
+	# Do not forget to bump revision of reverse dependencies and rebuild them
+	# after SOVERSION is changed.
+	local _SOVERSION=9
+
+	local e=$(sed -En 's/^libnet_la_LDFLAGS\s*=.*\s+-version-info\s+([0-9]+):([0-9]+):([0-9]+).*/\1-\3/p' \
+			src/Makefile.am)
+	if [ ! "${e}" ] || [ "${_SOVERSION}" != "$(( "${e}" ))" ]; then
+		termux_error_exit "SOVERSION guard check failed."
+	fi
+}