diff --git a/tools/hunk/hunk.go b/tools/hunk/hunk.go
index 1bbe49ab..952728a5 100644
--- a/tools/hunk/hunk.go
+++ b/tools/hunk/hunk.go
@@ -39,6 +39,7 @@ const (
 	EXT_DEF               = 1   // relocatable definition
 	EXT_ABS               = 2   // Absolute definition
 	EXT_RES               = 3   // no longer supported
+	EXT_GNU_LOCAL         = 33  // GNU local symbol definition
 	EXT_REF32             = 129 // 32 bit absolute reference to symbol
 	EXT_COMMON            = 130 // 32 bit absolute reference to COMMON block
 	EXT_REF16             = 131 // 16 bit PC-relative reference to symbol
@@ -103,6 +104,7 @@ func init() {
 		EXT_DEF:       "EXT_DEF",
 		EXT_ABS:       "EXT_ABS",
 		EXT_RES:       "EXT_RES",
+		EXT_GNU_LOCAL: "EXT_GNU_LOCAL",
 		EXT_REF32:     "EXT_REF32",
 		EXT_COMMON:    "EXT_COMMON",
 		EXT_REF16:     "EXT_REF16",
diff --git a/tools/hunk/hunk_debug.go b/tools/hunk/hunk_debug.go
index 8eb634d7..b5a26c40 100644
--- a/tools/hunk/hunk_debug.go
+++ b/tools/hunk/hunk_debug.go
@@ -45,7 +45,6 @@ func readStrTab(r io.Reader, size uint32) []byte {
 }
 
 func readHunkDebugGnu(r io.Reader, name string) HunkDebugGnu {
-	fmt.Printf("HunkDebugGnu: %s\n", name)
 	var stabTab []Stab
 	var stabstrTab []byte
 	if name == "" {
diff --git a/tools/hunk/hunk_ext.go b/tools/hunk/hunk_ext.go
index 122dac12..9186ca89 100644
--- a/tools/hunk/hunk_ext.go
+++ b/tools/hunk/hunk_ext.go
@@ -29,7 +29,7 @@ func readHunkExt(r io.Reader) HunkExt {
 		extType := ExtType(nlongs >> 24)
 		name := readStringOfSize(r, length)
 		switch extType {
-		case EXT_DEF, EXT_ABS, EXT_RES:
+		case EXT_DEF, EXT_ABS, EXT_RES, EXT_GNU_LOCAL:
 			value := readLong(r)
 			ext = append(ext, Extern{extType, name, value, nil})
 		case EXT_REF32, EXT_REF16, EXT_REF8, EXT_DEXT32, EXT_DEXT16, EXT_DEXT8:
@@ -38,7 +38,7 @@ func readHunkExt(r io.Reader) HunkExt {
 			size := readLong(r)
 			ext = append(ext, Extern{extType, name, size, readArrayOfLong(r)})
 		default:
-			panic("unknown external type")
+			panic(fmt.Sprintf("unknown external type: %v", extType))
 		}
 	}
 	sort.Slice(ext, func(i, j int) bool {