diff --git a/plugins/docker/docker_volumesize b/plugins/docker/docker_volumesize
index 3be53b5d..d1f598b4 100644
--- a/plugins/docker/docker_volumesize
+++ b/plugins/docker/docker_volumesize
@@ -50,6 +50,8 @@ if [ "$1" = "config" ]; then
   echo "graph_args -l 0 --base 1024"
   echo "graph_info This graph shows the size per volume."
   while IFS= read -r line; do
+    # ignore empty lines
+    [ -n "$line" ] || continue
     echo "$line" | awk 'BEGIN { FS = ":" } { label = substr($1, 1, 30); print $1 ".label " label }'
     # display info only when labels are set
     if [ -n "$(echo "$line" | awk 'BEGIN { FS = ":" } { print $3 }')" ]; then
@@ -62,6 +64,8 @@ fi
 
 echo "multigraph volumesize"
 while IFS= read -r line; do
+  # ignore empty lines
+  [ -n "$line" ] || continue
   name=$(echo "$line" | awk 'BEGIN { FS = ":" } { print $1 }')
   value=$(echo "$line" | awk 'BEGIN { FS = ":" } { print $2 }')