diff --git a/src/cmd/compile/internal/base/hashdebug.go b/src/cmd/compile/internal/base/hashdebug.go
index c93d042f71..609f80393e 100644
--- a/src/cmd/compile/internal/base/hashdebug.go
+++ b/src/cmd/compile/internal/base/hashdebug.go
@@ -140,7 +140,7 @@ func NewHashDebug(ev, s string, file writeSyncer) *HashDebug {
 		hd.no = true
 		return hd
 	}
-	ss := strings.Split(s, ";")
+	ss := strings.Split(s, "/")
 	hd.matches = append(hd.matches, toHashAndMask(ss[0], ev))
 	// hash searches may use additional EVs with 0, 1, 2, ... suffixes.
 	for i := 1; i < len(ss); i++ {
diff --git a/src/cmd/compile/internal/base/hashdebug_test.go b/src/cmd/compile/internal/base/hashdebug_test.go
index decdf5ce0f..b74169f895 100644
--- a/src/cmd/compile/internal/base/hashdebug_test.go
+++ b/src/cmd/compile/internal/base/hashdebug_test.go
@@ -130,7 +130,7 @@ func TestHashNoMatch(t *testing.T) {
 
 func TestHashSecondMatch(t *testing.T) {
 	ws := new(bufferWithSync)
-	hd := NewHashDebug("GOSSAHASH", "001100;0011", ws)
+	hd := NewHashDebug("GOSSAHASH", "001100/0011", ws)
 
 	check := hd.DebugHashMatch("bar")
 	msg := ws.String()