diff --git a/src/mail/filtertypes.xml.in b/src/mail/filtertypes.xml.in
index f0993fc6d2..6df9789f4e 100644
--- a/src/mail/filtertypes.xml.in
+++ b/src/mail/filtertypes.xml.in
@@ -580,6 +580,14 @@
     <_title>Do Not Exist</_title>
     <code>(not (system-flag "Attachments"))</code>
    </option>
+   <option value="contain-icalendar">
+    <_title>Contain iCalendar Data</_title>
+    <code>(user-flag "$has_cal")</code>
+   </option>
+   <option value="not-contain-icalendar">
+    <_title>Do Not Contain iCalendar Data</_title>
+    <code>(not (user-flag "$has_cal"))</code>
+   </option>
   </input>
  </part>
 
diff --git a/src/mail/searchtypes.xml.in b/src/mail/searchtypes.xml.in
index f89c925f54..6f84fe2918 100644
--- a/src/mail/searchtypes.xml.in
+++ b/src/mail/searchtypes.xml.in
@@ -651,6 +651,14 @@
     <_title>Do Not Exist</_title>
     <code>(not (system-flag "Attachments"))</code>
    </option>
+   <option value="contain-icalendar">
+    <_title>Contain iCalendar Data</_title>
+    <code>(user-flag "$has_cal")</code>
+   </option>
+   <option value="not-contain-icalendar">
+    <_title>Do Not Contain iCalendar Data</_title>
+    <code>(not (user-flag "$has_cal"))</code>
+   </option>
   </input>
  </part>
 
diff --git a/src/mail/vfoldertypes.xml.in b/src/mail/vfoldertypes.xml.in
index 12858f0eb0..581be8fc65 100644
--- a/src/mail/vfoldertypes.xml.in
+++ b/src/mail/vfoldertypes.xml.in
@@ -654,6 +654,14 @@
     <_title>Do Not Exist</_title>
     <code>(not (system-flag "Attachments"))</code>
    </option>
+   <option value="contain-icalendar">
+    <_title>Contain iCalendar Data</_title>
+    <code>(user-flag "$has_cal")</code>
+   </option>
+   <option value="not-contain-icalendar">
+    <_title>Do Not Contain iCalendar Data</_title>
+    <code>(not (user-flag "$has_cal"))</code>
+   </option>
   </input>
  </part>