diff --git a/cl/compile.go b/cl/compile.go
index be978fc43..7aea9a450 100644
--- a/cl/compile.go
+++ b/cl/compile.go
@@ -23,6 +23,7 @@ import (
 
 	"github.com/goplus/gogen"
 	"github.com/goplus/llcppg/clang"
+	lc "github.com/llarhub/clang-c"
 )
 
 const (
@@ -286,6 +287,14 @@ func loadFiles(ctx *pkgCtx, files []Source, myPkgPath string, goFileOf func(head
 		clang.VisitChildren(f.Cursor(), func(decl, parent clang.Cursor) clang.ChildVisitResult {
 			if pkgOf != nil {
 				at := clang.PresumedFile(decl.Location())
+				switch decl.Kind {
+				case lc.Cursor_ClassDecl, lc.Cursor_StructDecl:
+					if decl.IsCursorDefinition() == 0 {
+						if definition := decl.Definition(); definition.IsNull() == 0 {
+							at = clang.PresumedFile(definition.Location())
+						}
+					}
+				}
 				if _, ok := lastSeen[at]; ok {
 					return clang.Continue // already loaded
 				}
diff --git a/tool/_testc/python-3.14.8/cpython-pythread.go b/tool/_testc/python-3.14.8/cpython-pythread.go
index 461353b06..2a58460e0 100644
--- a/tool/_testc/python-3.14.8/cpython-pythread.go
+++ b/tool/_testc/python-3.14.8/cpython-pythread.go
@@ -3,10 +3,15 @@
 package py
 
 import (
-	c1 "github.com/goplus/lib/c"
+	"github.com/goplus/lib/c"
 	"github.com/goplus/lib/c/pthread"
 	_ "unsafe"
 )
 
+type X_PyTssT struct {
+	X_isInitialized c.Int
+	X_key           pthread.Key
+}
+
 //go:linkname PY_TIMEOUT_MAX C.PY_TIMEOUT_MAX
-var PY_TIMEOUT_MAX c1.LongLong
+var PY_TIMEOUT_MAX c.LongLong
diff --git a/tool/_testc/python-3.14.8/pythread.go b/tool/_testc/python-3.14.8/pythread.go
index 8ab5457d6..5691553b7 100644
--- a/tool/_testc/python-3.14.8/pythread.go
+++ b/tool/_testc/python-3.14.8/pythread.go
@@ -13,8 +13,4 @@ const (
 )
 
 type PyThreadTypeLock uintptr
-type X_PyTssT struct {
-	X_isInitialized c1.Int
-	X_key           pthread.Key
-}
 type PyTssT = X_PyTssT