diff --git a/src/cmd/compile/internal/liveness/plive.go b/src/cmd/compile/internal/liveness/plive.go
index 09af864b69..2ee007f4a6 100644
--- a/src/cmd/compile/internal/liveness/plive.go
+++ b/src/cmd/compile/internal/liveness/plive.go
@@ -979,7 +979,7 @@ func (lv *liveness) enableClobber() {
 		// Clobber only functions where the hash of the function name matches a pattern.
 		// Useful for binary searching for a miscompiled function.
 		hstr := ""
-		for _, b := range hash.Sum32([]byte(lv.f.Name)) {
+		for _, b := range hash.Sum20([]byte(lv.f.Name)) {
 			hstr += fmt.Sprintf("%08b", b)
 		}
 		if !strings.HasSuffix(hstr, h) {
diff --git a/src/cmd/internal/obj/objfile.go b/src/cmd/internal/obj/objfile.go
index 6aa208a1c0..5ac15b8228 100644
--- a/src/cmd/internal/obj/objfile.go
+++ b/src/cmd/internal/obj/objfile.go
@@ -494,7 +494,7 @@ func contentHash64(s *LSym) goobj.Hash64Type {
 // For now, we assume there is no circular dependencies among
 // hashed symbols.
 func (w *writer) contentHash(s *LSym) goobj.HashType {
-	h := hash.New32()
+	h := hash.New20()
 	var tmp [14]byte
 
 	// Include the size of the symbol in the hash.
diff --git a/src/cmd/link/internal/ld/elf.go b/src/cmd/link/internal/ld/elf.go
index f6f957a333..6bdd544a16 100644
--- a/src/cmd/link/internal/ld/elf.go
+++ b/src/cmd/link/internal/ld/elf.go
@@ -1677,11 +1677,11 @@ func (ctxt *Link) doelf() {
 		sb.SetType(sym.SRODATA)
 		ldr.SetAttrSpecial(s, true)
 		sb.SetReachable(true)
-		sb.SetSize(hash.Size32)
+		sb.SetSize(hash.Size20)
 		slices.SortFunc(ctxt.Library, func(a, b *sym.Library) int {
 			return strings.Compare(a.Pkg, b.Pkg)
 		})
-		h := hash.New32()
+		h := hash.New20()
 		for _, l := range ctxt.Library {
 			h.Write(l.Fingerprint[:])
 		}
diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go
index 61bca49176..643356d602 100644
--- a/src/cmd/link/internal/ld/lib.go
+++ b/src/cmd/link/internal/ld/lib.go
@@ -1012,7 +1012,7 @@ func typeSymbolMangle(name string) string {
 		return name
 	}
 	if isType {
-		hb := hash.Sum32([]byte(name[5:]))
+		hb := hash.Sum20([]byte(name[5:]))
 		prefix := "type:"
 		if name[5] == '.' {
 			prefix = "type:."
@@ -1025,7 +1025,7 @@ func typeSymbolMangle(name string) string {
 	if j == -1 || j <= i {
 		j = len(name)
 	}
-	hb := hash.Sum32([]byte(name[i+1 : j]))
+	hb := hash.Sum20([]byte(name[i+1 : j]))
 	return name[:i+1] + base64.StdEncoding.EncodeToString(hb[:6]) + name[j:]
 }