diff --git a/sympa/recipe/sympa_fix_personalization.recipe b/sympa/recipe/sympa_fix_personalization.recipe
index a40d9aa..2c36caf 100644
--- a/sympa/recipe/sympa_fix_personalization.recipe
+++ b/sympa/recipe/sympa_fix_personalization.recipe
@@ -23,6 +23,7 @@ function fix_personalization {
 function patch_message_pm {
 	if [[ -f $MESSAGE_PM ]]; then
 		if ! grep -q '^.*qw/subject x-originating-ip message-id date x-original-to x-original-from.*$' "$MESSAGE_PM"; then
+			echo 'applying patch message pm'
 			/opt/miaou-bash/tools/append_or_replace '^.*qw/subject x-originating-ip message-id date x-original-to.*$' '        qw/subject x-originating-ip message-id date x-original-to x-original-from from to thread-topic content-type/' "$MESSAGE_PM"
 			FOUND=true
 		else
@@ -30,7 +31,7 @@ function patch_message_pm {
 		fi
 		message=$(prepend_2lines_of_text_before_existing_line "$MESSAGE_PM" '$data->{sender}  = $self->{sender};' '$data->{gecos}  = $self->{gecos};' '$data->{subject} = $self->{decoded_subject};')
 		if [[ $message =~ 'do prepend' ]]; then
-			echo 'sender and gecos now prepended'
+			echo 'prepending sender and gecos in message pm'
 			FOUND=true
 		else
 			echo 'sender and gecos already prepended!'
@@ -49,7 +50,7 @@ function prepend_2lines_of_text_before_existing_line {
 
 	[[ ! -f $file ]] && echo "file: $file not found!" && exit 20
 
-	if ! grep "^$existing$" $file -B2 | grep -qz "$line1.*$line2.*$existing"; then
+	if ! (grep "^$existing$" $file -B2 | grep -qz "$line1.*$line2.*$existing"); then
 		echo 'do prepend'
 		sed -i "/^$existing$/s/^/$line1\n$line2\n/" $file
 	else