diff --git a/package/prudynt-t/files/record b/package/prudynt-t/files/record
index d04b4672c..a4978488f 100755
--- a/package/prudynt-t/files/record
+++ b/package/prudynt-t/files/record
@@ -98,6 +98,13 @@ touch $RECORD_FLAG
 #	fi
 #fi
 
+LOCK_FILE="/tmp/record.lock"
+
+# Add near start, before the main loop:
+if ! mkdir "$LOCK_FILE" 2>/dev/null; then
+    die "Another instance is already running"
+fi
+trap 'rm -rf "$LOCK_FILE"' EXIT
 required_space=$((120 * record_duration))
 min_free_space=$(($(df | grep "$record_mount" | awk '{print $2}') * (100 - record_diskusage) / 100 ))
 [ "$min_free_space" -gt "$required_space" ] && required_space=$min_free_space