diff --git a/internal/erf/erf.go b/internal/erf/erf.go
index 671a5b4..1f95df5 100644
--- a/internal/erf/erf.go
+++ b/internal/erf/erf.go
@@ -75,9 +75,9 @@ var extensionTypes = map[string]uint16{
 	"set": 0x07DD,
 	"ifo": 0x07DE,
 	"bic": 0x07DF,
-	"wok": 0x07E1,
-	"2da": 0x07E2,
-	"tlk": 0x07E3,
+	"wok": 0x07E0,
+	"2da": 0x07E1,
+	"tlk": 0x07E2,
 	"txi": 0x07E6,
 	"git": 0x07E7,
 	"uti": 0x07E9,
@@ -130,9 +130,9 @@ var typeExtensions = map[uint16]string{
 	0x07DD: "set",
 	0x07DE: "ifo",
 	0x07DF: "bic",
-	0x07E1: "wok",
-	0x07E2: "2da",
-	0x07E3: "tlk",
+	0x07E0: "wok",
+	0x07E1: "2da",
+	0x07E2: "tlk",
 	0x07E6: "txi",
 	0x07E7: "git",
 	0x07E9: "uti",
diff --git a/internal/erf/erf_test.go b/internal/erf/erf_test.go
index ebdec57..e9a2833 100644
--- a/internal/erf/erf_test.go
+++ b/internal/erf/erf_test.go
@@ -34,8 +34,8 @@ func TestExtensionMappingsKeep2DAAndTLKDistinct(t *testing.T) {
 	if !ok {
 		t.Fatal("expected 2da resource type")
 	}
-	if resourceType != 0x07E2 {
-		t.Fatalf("expected 2da type 0x07E2, got 0x%04X", resourceType)
+	if resourceType != 0x07E1 {
+		t.Fatalf("expected 2da type 0x07E1, got 0x%04X", resourceType)
 	}
 	extension, ok := ExtensionForResourceType(resourceType)
 	if !ok {
@@ -49,8 +49,8 @@ func TestExtensionMappingsKeep2DAAndTLKDistinct(t *testing.T) {
 	if !ok {
 		t.Fatal("expected tlk resource type")
 	}
-	if tlkType != 0x07E3 {
-		t.Fatalf("expected tlk type 0x07E3, got 0x%04X", tlkType)
+	if tlkType != 0x07E2 {
+		t.Fatalf("expected tlk type 0x07E2, got 0x%04X", tlkType)
 	}
 	if tlkType == resourceType {
 		t.Fatal("expected 2da and tlk resource types to stay distinct")
diff --git a/internal/topdata/topdata_test.go b/internal/topdata/topdata_test.go
index a846abf..01230da 100644
--- a/internal/topdata/topdata_test.go
+++ b/internal/topdata/topdata_test.go
@@ -8308,8 +8308,8 @@ func TestBuildAndPackageIncludesCompiled2DAAndTopAssets(t *testing.T) {
 		ext, _ := erf.ExtensionForResourceType(resource.Type)
 		key := strings.ToLower(resource.Name) + "." + ext
 		if key == "repadjust.2da" {
-			if resource.Type != 0x07E2 {
-				t.Fatalf("expected repadjust.2da to keep resource type 0x07E2, got 0x%04X", resource.Type)
+			if resource.Type != 0x07E1 {
+				t.Fatalf("expected repadjust.2da to keep resource type 0x07E1, got 0x%04X", resource.Type)
 			}
 			found2DA = true
 		}