diff --git a/fuzz/fuzz_seeds/postgres_alter_extension.sql b/fuzz/fuzz_seeds/postgres_alter_extension.sql
index 1b8532c1de..44eb414408 100644
--- a/fuzz/fuzz_seeds/postgres_alter_extension.sql
+++ b/fuzz/fuzz_seeds/postgres_alter_extension.sql
@@ -18,3 +18,4 @@ ALTER EXTENSION citext ADD TEXT SEARCH CONFIGURATION public.cfg;
 ALTER EXTENSION citext ADD TEXT SEARCH DICTIONARY public.dict;
 ALTER EXTENSION citext DROP TEXT SEARCH PARSER public.pgrm;
 ALTER EXTENSION citext ADD TEXT SEARCH TEMPLATE public.tpl;
+ALTER EXTENSION citext DROP DATABASE db_name;
diff --git a/src/ast/ddl.rs b/src/ast/ddl.rs
index 72f233b936..d46b877d91 100644
--- a/src/ast/ddl.rs
+++ b/src/ast/ddl.rs
@@ -4922,6 +4922,10 @@ pub enum AlterExtensionOperation {
 }
 
 /// Member objects that can be added to or removed from an extension.
+///
+/// `ADD` and `DROP` also accept `DATABASE`, `ROLE`, `SUBSCRIPTION`, `TABLESPACE`,
+/// `PUBLICATION`, `EXTENSION`, `INDEX`, and `STATISTICS` member objects, which
+/// PostgreSQL rejects with a semantic error.
 #[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
@@ -4932,6 +4936,8 @@ pub enum AlterExtensionMember {
     Collation(ObjectName),
     /// `CONVERSION object_name`
     Conversion(ObjectName),
+    /// `DATABASE object_name`
+    Database(Ident),
     /// `EVENT TRIGGER object_name`
     EventTrigger(Ident),
     /// `FOREIGN DATA WRAPPER object_name`
@@ -4992,6 +4998,7 @@ impl fmt::Display for AlterExtensionMember {
             AlterExtensionMember::AccessMethod(name) => write!(f, "ACCESS METHOD {name}"),
             AlterExtensionMember::Collation(name) => write!(f, "COLLATION {name}"),
             AlterExtensionMember::Conversion(name) => write!(f, "CONVERSION {name}"),
+            AlterExtensionMember::Database(name) => write!(f, "DATABASE {name}"),
             AlterExtensionMember::EventTrigger(name) => write!(f, "EVENT TRIGGER {name}"),
             AlterExtensionMember::ForeignDataWrapper(name) => {
                 write!(f, "FOREIGN DATA WRAPPER {name}")
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index fa65140131..5d24eedb5d 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -12549,6 +12549,8 @@ impl<'a> Parser<'a> {
             Ok(AlterExtensionMember::Conversion(
                 self.parse_object_name(false)?,
             ))
+        } else if self.parse_keyword(Keyword::DATABASE) {
+            Ok(AlterExtensionMember::Database(self.parse_identifier()?))
         } else if self.parse_keywords(&[Keyword::EVENT, Keyword::TRIGGER]) {
             Ok(AlterExtensionMember::EventTrigger(self.parse_identifier()?))
         } else if self.parse_keywords(&[Keyword::FOREIGN, Keyword::DATA, Keyword::WRAPPER]) {
diff --git a/tests/sqlparser_postgres.rs b/tests/sqlparser_postgres.rs
index f1a52892c1..4ac59bd631 100644
--- a/tests/sqlparser_postgres.rs
+++ b/tests/sqlparser_postgres.rs
@@ -13532,6 +13532,7 @@ fn alter_extension_member_round_trip_forms(action: &str) {
         format!("ALTER EXTENSION ext_name {action} COLLATION en_US"),
         format!("ALTER EXTENSION ext_name {action} COLLATION schema.en_US"),
         format!("ALTER EXTENSION ext_name {action} CONVERSION conv"),
+        format!("ALTER EXTENSION ext_name {action} DATABASE db_name"),
         format!("ALTER EXTENSION ext_name {action} EVENT TRIGGER trg"),
         format!("ALTER EXTENSION ext_name {action} FOREIGN DATA WRAPPER fdw"),
         format!("ALTER EXTENSION ext_name {action} FOREIGN TABLE ft"),
@@ -13727,6 +13728,7 @@ fn parse_alter_extension_add_member() {
         "ACCESS METHOD",
         "COLLATION",
         "CONVERSION",
+        "DATABASE",
         "EVENT TRIGGER",
         "FOREIGN DATA WRAPPER",
         "FOREIGN TABLE",