diff --git a/_xtool/llcppsymg/internal/symg/parse.go b/_xtool/llcppsymg/internal/symg/parse.go
index 9e1d3bf1..9076e19e 100644
--- a/_xtool/llcppsymg/internal/symg/parse.go
+++ b/_xtool/llcppsymg/internal/symg/parse.go
@@ -130,12 +130,15 @@ func (p *SymbolProcessor) beRecv(cur clang.Cursor) (ok bool, isPtr bool, typeNam
 
 // sqlite3_finalize -> .Close -> method
 // sqlite3_open -> Open -> function
-func (p *SymbolProcessor) customGoName(mangled string) (goName string, isMethod bool, ok bool) {
+func (p *SymbolProcessor) customGoName(mangled string) (goName string, isMethod bool, isIgnore bool, ok bool) {
 	if customName, ok := p.customSymMap[mangled]; ok {
+		if customName == "-" {
+			return "-", false, true, true
+		}
 		name, found := strings.CutPrefix(customName, ".")
-		return name, found, true
+		return name, found, false, true
 	}
-	return "", false, false
+	return "", false, false, false
 }
 
 func (p *SymbolProcessor) genGoName(cursor clang.Cursor, symbolName string) string {
@@ -148,7 +151,12 @@ func (p *SymbolProcessor) genGoName(cursor clang.Cursor, symbolName string) stri
 		convertedName = name.GoName(originName, p.prefixes, p.inCurPkg(cursor))
 	}
 
-	customGoName, toMethod, isCustom := p.customGoName(symbolName)
+	customGoName, toMethod, isIgnore, isCustom := p.customGoName(symbolName)
+	
+	// Early return if symbol should be ignored
+	if isIgnore {
+		return customGoName
+	}
 
 	// 1. for class method,gen method name
 	if parent := cursor.SemanticParent(); parent.Kind == clang.CursorClassDecl {
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/c.c b/_xtool/llcppsymg/internal/symg/testdata/c/c.c
index afb73f89..1e8cfac3 100644
--- a/_xtool/llcppsymg/internal/symg/testdata/c/c.c
+++ b/_xtool/llcppsymg/internal/symg/testdata/c/c.c
@@ -10,6 +10,7 @@ Foo *Foo_ParseWithLength(const char *value, size_t buffer_length) {}
 Foo *Foo_ParseWithSize(const char *value, size_t buffer_length) {}
 
 Foo *Foo_ignoreFunc() {}
+Foo *Foo_ignoreFunc2() {}
 
 // config Foo_ForBar to Bar,so Foo_Bar to Bar__1
 void Foo_Bar() {}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/c.h b/_xtool/llcppsymg/internal/symg/testdata/c/c.h
index c24f6f08..712fd2af 100644
--- a/_xtool/llcppsymg/internal/symg/testdata/c/c.h
+++ b/_xtool/llcppsymg/internal/symg/testdata/c/c.h
@@ -17,6 +17,9 @@ Foo *Foo_ParseWithLength(const char *value, size_t buffer_length);
 Foo *Foo_ParseWithSize(const char *value, size_t buffer_length);
 
 Foo *Foo_ignoreFunc();
+// https://github.com/goplus/llcppg/issues/522
+Foo *Foo_ignoreFunc2();
+
 
 // config Foo_ForBar to Bar,so Foo_Bar to Bar__1
 void Foo_Bar();
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/darwin/libc.a b/_xtool/llcppsymg/internal/symg/testdata/c/darwin/libc.a
index 878c0ee7..10fcde2c 100644
Binary files a/_xtool/llcppsymg/internal/symg/testdata/c/darwin/libc.a and b/_xtool/llcppsymg/internal/symg/testdata/c/darwin/libc.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/expect.json b/_xtool/llcppsymg/internal/symg/testdata/c/expect.json
index 40dd0442..f9b377db 100644
--- a/_xtool/llcppsymg/internal/symg/testdata/c/expect.json
+++ b/_xtool/llcppsymg/internal/symg/testdata/c/expect.json
@@ -73,5 +73,10 @@
     "mangle": "Foo_ignoreFunc",
     "c++": "Foo_ignoreFunc()",
     "go": "-"
+  },
+  {
+    "mangle": "Foo_ignoreFunc2",
+    "c++": "Foo_ignoreFunc2()",
+    "go": "-"
   }
 ]
\ No newline at end of file
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/linux/libc.a b/_xtool/llcppsymg/internal/symg/testdata/c/linux/libc.a
index 560f8410..a1620192 100644
Binary files a/_xtool/llcppsymg/internal/symg/testdata/c/linux/libc.a and b/_xtool/llcppsymg/internal/symg/testdata/c/linux/libc.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/llcppg.cfg b/_xtool/llcppsymg/internal/symg/testdata/c/llcppg.cfg
index 202c3828..b6413d35 100644
--- a/_xtool/llcppsymg/internal/symg/testdata/c/llcppg.cfg
+++ b/_xtool/llcppsymg/internal/symg/testdata/c/llcppg.cfg
@@ -10,6 +10,7 @@
 		"Foo_Delete":"Delete",
 		"Foo_ParseWithSize":".ParseWithSize",
 		"Foo_ignoreFunc":"-",
+		"Foo_ignoreFunc2":"-",
 		"Foo_ForBar":"Bar",
 		"Foo_Bar2":"Bar2",
 		"Foo_ForBar2":"Bar2",