diff --git a/internal/services/postgres/validate/postgresql_database_collation.go b/internal/services/postgres/validate/postgresql_database_collation.go
index 280612a7d05c..28583744e3ed 100644
--- a/internal/services/postgres/validate/postgresql_database_collation.go
+++ b/internal/services/postgres/validate/postgresql_database_collation.go
@@ -271,12 +271,13 @@ var languageCodes = map[string]struct{}{
 }
 
 var specialCases = map[string]struct{}{
-	".utf8":                      {},
-	"C":                          {},
-	"POSIX":                      {},
-	"English_United States.1252": {},
-	"ucs_basic":                  {},
-	"default":                    {},
+	".utf8":                       {},
+	"C":                           {},
+	"POSIX":                       {},
+	"English_United Kingdom.1252": {},
+	"English_United States.1252":  {},
+	"ucs_basic":                   {},
+	"default":                     {},
 }
 
 var databaseCollationDidNotMatchError = func(fieldName, value string) error {
diff --git a/internal/services/postgres/validate/postgresql_database_collation_test.go b/internal/services/postgres/validate/postgresql_database_collation_test.go
index e40362dfeca7..2c776a0287a1 100644
--- a/internal/services/postgres/validate/postgresql_database_collation_test.go
+++ b/internal/services/postgres/validate/postgresql_database_collation_test.go
@@ -136,13 +136,14 @@ func TestPostgresqlDatabaseCollation_LocalesThirdComponent(t *testing.T) {
 func TestPostgresqlDatabaseCollation_SpecialCases(t *testing.T) {
 	cases := map[string]struct{}{
 		// these are special-cases
-		".utf8":                      {},
-		"C":                          {},
-		"POSIX":                      {},
-		"English_United States.1252": {},
-		"En-US":                      {},
-		"ucs_basic":                  {},
-		"default":                    {},
+		".utf8":                       {},
+		"C":                           {},
+		"POSIX":                       {},
+		"English_United Kingdom.1252": {},
+		"English_United States.1252":  {},
+		"En-US":                       {},
+		"ucs_basic":                   {},
+		"default":                     {},
 	}
 	for value := range cases {
 		t.Run(fmt.Sprintf("Value %q", value), func(t *testing.T) {