diff --git a/mailnews/addrbook/src/nsAbBSDirectory.cpp b/mailnews/addrbook/src/nsAbBSDirectory.cpp
index 5ce83b0074..f94e6880d6 100644
--- a/mailnews/addrbook/src/nsAbBSDirectory.cpp
+++ b/mailnews/addrbook/src/nsAbBSDirectory.cpp
@@ -64,9 +64,13 @@ nsresult nsAbBSDirectory::CreateDirectoriesFromFactory(const nsACString &aURI,
     nsCOMPtr<nsIAbDirectory> childDir = do_QueryInterface(newDirSupports, &rv);
     if (NS_FAILED(rv)) continue;
 
-    // Define a relationship between the preference
-    // entry and the directory
-    mServers.Put(aURI, aServer);
+    // In some cases (LDAP) the actual URI of the directory may differ from
+    // aURI. Use the URI of the directory.
+    nsCString uri;
+    childDir->GetURI(uri);
+
+    // Define a relationship between the preference entry and the directory.
+    mServers.Put(uri, aServer);
 
     mSubDirectories.AppendObject(childDir);
 
diff --git a/mailnews/addrbook/test/unit/test_ldap1.js b/mailnews/addrbook/test/unit/test_ldap1.js
index 2c3fbf048e..8588323b60 100644
--- a/mailnews/addrbook/test/unit/test_ldap1.js
+++ b/mailnews/addrbook/test/unit/test_ldap1.js
@@ -14,6 +14,8 @@ function run_test() {
     return;
   }
 
+  let abCountBeforeStart = [...MailServices.ab.directories].length;
+
   // Test - Create an LDAP directory
   let abUri = MailServices.ab.newAddressBook(
     "test",
@@ -21,6 +23,9 @@ function run_test() {
     kLDAPDirectory
   );
 
+  let abCountAfterCreate = [...MailServices.ab.directories].length;
+  Assert.equal(abCountAfterCreate, abCountBeforeStart + 1);
+
   // Test - Check we have the directory.
   let abDir = MailServices.ab
     .getDirectory(kLDAPUriPrefix + abUri)
@@ -193,4 +198,9 @@ function run_test() {
   }
 
   localAcTests.forEach(checkAc);
+
+  MailServices.ab.deleteAddressBook(abDir.URI);
+
+  let abCountAfterDelete = [...MailServices.ab.directories].length;
+  Assert.equal(abCountAfterDelete, abCountBeforeStart);
 }