diff --git a/sympa/recipe/sympa_fix_personalization.recipe b/sympa/recipe/sympa_fix_personalization.recipe
index 1caed03..dcb666a 100644
--- a/sympa/recipe/sympa_fix_personalization.recipe
+++ b/sympa/recipe/sympa_fix_personalization.recipe
@@ -29,7 +29,7 @@ function patch_message_pm {
 			echo 'already patched!'
 		fi
 		message=$(prepend_2lines_of_text_before_existing_line "$MESSAGE_PM" '$data->{sender}  = $self->{sender};' '$data->{gecos}  = $self->{gecos};' '$data->{subject} = $self->{decoded_subject};')
-		[[ $message =~ 'do prepend']] && FOUND=true || true
+		[[ $message =~ 'do prepend' ]] && FOUND=true || true
 	else
 		echo "file: $MESSAGE_PM not found!" && exit 11
 	fi