diff --git a/buffer-size.sh b/buffer-size.sh
index fae8ba0..b16edff 100644
--- a/buffer-size.sh
+++ b/buffer-size.sh
@@ -1,12 +1,12 @@
 #!/bin/sh
 
-while true; do
-
-echo "# HELP node_buffer_size_bytes Disk space used" > /prometheus/node_exporter/textfile_collector/buffer_size.prom
-echo "# TYPE node_buffer_size_bytes gauge" >> /prometheus/node_exporter/textfile_collector/buffer_size.prom
-
 [ -z "$BUFFER_PATH" ] && BUFFER_PATH=/buffers
-du -ab ${BUFFER_PATH} | sed -ne 's/\\/\\\\/;s/"/\\"/g;s/^\([0-9]\+\)\t\(.*\)$/node_buffer_size_bytes{entity="\2"} \1/p' >> /prometheus/node_exporter/textfile_collector/buffer_size.prom
 
-sleep 60
+while true; do
+    echo "# HELP node_buffer_size_bytes Disk space used" > /prometheus/node_exporter/textfile_collector/buffer_size.prom
+    echo "# TYPE node_buffer_size_bytes gauge" >> /prometheus/node_exporter/textfile_collector/buffer_size.prom
+    du -ab ${BUFFER_PATH} | sed -ne 's/\\/\\\\/;s/"/\\"/g;s/^\([0-9]\+\)\t\(.*\)$/node_buffer_size_bytes{entity="\2"} \1/p' >> /prometheus/node_exporter/textfile_collector/buffer_size.prom.$$
+    mv /prometheus/node_exporter/textfile_collector/buffer_size.prom.$$ /prometheus/node_exporter/textfile_collector/buffer_size.prom
+
+    sleep 60
 done