diff --git a/src/cmd/compile/internal/types2/stmt.go b/src/cmd/compile/internal/types2/stmt.go
index c9713dac6f..272636ff39 100644
--- a/src/cmd/compile/internal/types2/stmt.go
+++ b/src/cmd/compile/internal/types2/stmt.go
@@ -1026,9 +1026,8 @@ func rangeKeyVal(typ Type, allowVersion func(goVersion) bool) (key, val Type, ca
 		}
 		return typ.elem, nil, "", false, true
 	case *Signature:
-		// TODO(gri) when this becomes enabled permanently, add version check
-		if !buildcfg.Experiment.RangeFunc {
-			break
+		if !buildcfg.Experiment.RangeFunc && allowVersion != nil && !allowVersion(go1_23) {
+			return bad("requires go1.23 or later")
 		}
 		assert(typ.Recv() == nil)
 		switch {
diff --git a/src/cmd/compile/internal/types2/version.go b/src/cmd/compile/internal/types2/version.go
index 5aa3c803b5..b904072a7b 100644
--- a/src/cmd/compile/internal/types2/version.go
+++ b/src/cmd/compile/internal/types2/version.go
@@ -44,6 +44,7 @@ var (
 	go1_20 = asGoVersion("go1.20")
 	go1_21 = asGoVersion("go1.21")
 	go1_22 = asGoVersion("go1.22")
+	go1_23 = asGoVersion("go1.23")
 
 	// current (deployed) Go version
 	go_current = asGoVersion(fmt.Sprintf("go1.%d", goversion.Version))
diff --git a/src/go/types/stmt.go b/src/go/types/stmt.go
index 80f3ac75da..660085d6f2 100644
--- a/src/go/types/stmt.go
+++ b/src/go/types/stmt.go
@@ -1010,9 +1010,8 @@ func rangeKeyVal(typ Type, allowVersion func(goVersion) bool) (key, val Type, ca
 		}
 		return typ.elem, nil, "", false, true
 	case *Signature:
-		// TODO(gri) when this becomes enabled permanently, add version check
-		if !buildcfg.Experiment.RangeFunc {
-			break
+		if !buildcfg.Experiment.RangeFunc && allowVersion != nil && !allowVersion(go1_23) {
+			return bad("requires go1.23 or later")
 		}
 		assert(typ.Recv() == nil)
 		switch {
diff --git a/src/go/types/version.go b/src/go/types/version.go
index f2466edc1f..1b02ae5493 100644
--- a/src/go/types/version.go
+++ b/src/go/types/version.go
@@ -45,6 +45,7 @@ var (
 	go1_20 = asGoVersion("go1.20")
 	go1_21 = asGoVersion("go1.21")
 	go1_22 = asGoVersion("go1.22")
+	go1_23 = asGoVersion("go1.23")
 
 	// current (deployed) Go version
 	go_current = asGoVersion(fmt.Sprintf("go1.%d", goversion.Version))
diff --git a/src/internal/types/testdata/spec/range.go b/src/internal/types/testdata/spec/range.go
index 4ae270d233..07bd6b6769 100644
--- a/src/internal/types/testdata/spec/range.go
+++ b/src/internal/types/testdata/spec/range.go
@@ -1,5 +1,3 @@
-// -goexperiment=rangefunc
-
 // Copyright 2023 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.