diff --git a/rootfs/etc/services.d/mlathub/run b/rootfs/etc/services.d/mlathub/run
index 69376a5..074135e 100644
--- a/rootfs/etc/services.d/mlathub/run
+++ b/rootfs/etc/services.d/mlathub/run
@@ -96,9 +96,8 @@ if [[ -n "$READSB_NET_CONNECTOR_DELAY" ]]; then
 fi
 
 # Handle "--net-heartbeat=<rate>"
-if [[ -n "${READSB_NET_HEARTBEAT:-30}" ]]; then
-    MLATHUB_CMD+=("--net-heartbeat=$READSB_NET_HEARTBEAT")
-fi
+MLATHUB_CMD+=("--net-heartbeat=${READSB_NET_HEARTBEAT:-30}")
+
 
 if (( $(ps -o etimes= -p 1) < 30 ))
 then
diff --git a/rootfs/etc/services.d/readsb/run b/rootfs/etc/services.d/readsb/run
index 0868703..eaf3ee7 100644
--- a/rootfs/etc/services.d/readsb/run
+++ b/rootfs/etc/services.d/readsb/run
@@ -173,9 +173,7 @@ if [[ -n "$READSB_NET_CONNECTOR_DELAY" ]]; then
 fi
 
 # Handle "--net-heartbeat=<rate>"
-if [[ -n "$READSB_NET_HEARTBEAT" ]]; then
-    READSB_CMD+=("--net-heartbeat=$READSB_NET_HEARTBEAT")
-fi
+READSB_CMD+=("--net-heartbeat=${READSB_NET_HEARTBEAT:-30}")
 
 # Handle "--net-ri-port=<ports>"
 if [[ -n "$READSB_NET_RAW_INPUT_PORT" ]]; then