diff --git a/src/cmd/internal/objabi/util.go b/src/cmd/internal/objabi/util.go
index 9fbe6490e0..2a33f0d84a 100644
--- a/src/cmd/internal/objabi/util.go
+++ b/src/cmd/internal/objabi/util.go
@@ -171,6 +171,7 @@ func init() {
 	}
 
 	// Set GOEXPERIMENT to the parsed and canonicalized set of experiments.
+	// This format must be parseable by runtime.haveexperiment.
 	GOEXPERIMENT = expList()
 }
 
@@ -184,7 +185,7 @@ func init() {
 var FramePointerEnabled = GOARCH == "amd64" || GOARCH == "arm64"
 
 func addexp(s string) {
-	// Could do general integer parsing here, but the runtime.haveexperiment doesn't yet.
+	// We could do general integer parsing here, but there's no need yet.
 	v, vb := 1, true
 	name := s
 	if len(name) > 2 && name[:2] == "no" {
diff --git a/src/runtime/proc.go b/src/runtime/proc.go
index 9ebfe70883..a666f86abc 100644
--- a/src/runtime/proc.go
+++ b/src/runtime/proc.go
@@ -6027,6 +6027,9 @@ func setMaxThreads(in int) (out int) {
 }
 
 func haveexperiment(name string) bool {
+	// GOEXPERIMENT is a comma-separated list of enabled
+	// experiments. It's not the raw environment variable, but a
+	// pre-processed list from cmd/internal/objabi.
 	x := sys.GOEXPERIMENT
 	for x != "" {
 		xname := ""
@@ -6039,9 +6042,6 @@ func haveexperiment(name string) bool {
 		if xname == name {
 			return true
 		}
-		if len(xname) > 2 && xname[:2] == "no" && xname[2:] == name {
-			return false
-		}
 	}
 	return false
 }