diff --git a/App/lib/core/Gen/ExprGenCdef.vp b/App/lib/core/Gen/ExprGenCdef.vp
index 84b4fdc..0dbd85e 100644
--- a/App/lib/core/Gen/ExprGenCdef.vp
+++ b/App/lib/core/Gen/ExprGenCdef.vp
@@ -441,16 +441,17 @@ class ExprGenCdef(ExprGenBase.ExprGenBase):
             if pyi_buf[line_start + name_len] != ':':
                 continue
 
-            # 检查行是否包含 "t.CDefine"
-            # 在行中查找 "t.CDefine"
+            # 检查行是否包含 t.C 类型注解（CDefine 或 t.CSizeT/t.CInt 等常量类型）
+            # 原实现只认 "t.CDefine"（9 字符精确匹配），漏掉 t.CSizeT 等注解的
+            # 模块级常量全局（如 Phase1.PYI_BUF_SIZE: t.CSizeT = 262144，是 i64
+            # 全局常量而非 CDefine）→ "跨模块 CDefine 未找到" 误报。本函数仅被
+            # ALL_CAPS 名触发，t.C<大写> 类型 + 字面量初值即视为编译期常量。
             has_cdefine: int = 0
             ci: t.CSizeT = line_start + name_len + 1
-            while ci + 8 <= line_start + line_len:
+            while ci + 2 <= line_start + line_len:
                 if (pyi_buf[ci] == 't' and pyi_buf[ci + 1] == '.' and
-                    pyi_buf[ci + 2] == 'C' and pyi_buf[ci + 3] == 'D' and
-                    pyi_buf[ci + 4] == 'e' and pyi_buf[ci + 5] == 'f' and
-                    pyi_buf[ci + 6] == 'i' and pyi_buf[ci + 7] == 'n' and
-                    pyi_buf[ci + 8] == 'e'):
+                    pyi_buf[ci + 2] == 'C' and ci + 3 < line_start + line_len
+                    and pyi_buf[ci + 3] >= 'A' and pyi_buf[ci + 3] <= 'Z'):
                     has_cdefine = 1
                     break
                 ci += 1