diff --git a/.gitignore b/.gitignore
index c90eace..c65dff0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@
 /public/plugin_assets
 /tmp/*
 /tmp/cache/*
+/tmp/pdf/*
 /tmp/sessions/*
 /tmp/sockets/*
 /tmp/test/*
diff --git a/.hgignore b/.hgignore
index 3f7c702..6b081b5 100644
--- a/.hgignore
+++ b/.hgignore
@@ -20,6 +20,7 @@ public/dispatch.*
 public/plugin_assets
 tmp/*
 tmp/cache/*
+tmp/pdf/*
 tmp/sessions/*
 tmp/sockets/*
 tmp/test/*
diff --git a/doc/CHANGELOG b/doc/CHANGELOG
index e3987c5..eeb905d 100644
--- a/doc/CHANGELOG
+++ b/doc/CHANGELOG
@@ -13,6 +13,7 @@ http://www.redmine.org/
 * Defect #11365: Attachment description length is not validated
 * Defect #11541: Version sharing is missing in the REST API
 * Defect #11789: Edit section links broken with h5/h6 headings
+* Defect #12189: No tmp/pdf directory
 * Feature #11338: Exclude emails with auto-submitted => auto-generated
 * Patch #9732: German translations
 * Patch #11328: Fix Japanese mistranslation for 'label_language_based'
diff --git a/tmp/pdf/empty b/tmp/pdf/empty
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tmp/pdf/empty