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-rw-r--r--src/control.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/control.sh b/src/control.sh
index b25d00b..c8d742c 100644
--- a/src/control.sh
+++ b/src/control.sh
@@ -39,7 +39,7 @@ parse_control()
in_paragraph='false'
while IFS='' read -r line; do
- control_line_nr=$(($control_line_nr + 1))
+ control_line_nr=$((${control_line_nr} + 1))
if [ "x$(echo ${line})" = 'x' ]; then
# Paragraph end.
if ${in_paragraph}; then