diff --git a/doc/bugs/syntax_error_in_aggregate.mdwn b/doc/bugs/syntax_error_in_aggregate.mdwn
new file mode 100644
index 000000000..4ad57e771
--- /dev/null
+++ b/doc/bugs/syntax_error_in_aggregate.mdwn
@@ -0,0 +1,9 @@
+Current git :
+
+        $ perl -c IkiWiki/Plugin/aggregate.pm  
+        syntax error at IkiWiki/Plugin/aggregate.pm line 427, near "24;"
+        IkiWiki/Plugin/aggregate.pm had compilation errors.
+
+This prevents a Debian package build (due to `t/syntax.t`).
+
+Not knowing the units being used, I don't know where to add the missing parenthesis.