diff --git a/src/cmd/compile/internal/noder/writer.go b/src/cmd/compile/internal/noder/writer.go
index c3955c2cb6..2b22046de1 100644
--- a/src/cmd/compile/internal/noder/writer.go
+++ b/src/cmd/compile/internal/noder/writer.go
@@ -1661,10 +1661,7 @@ func (pw *pkgWriter) collectDecls(noders []*noder) {
 				}
 
 			default:
-				// TODO(mdempsky): Enable after #42938 is fixed.
-				if false {
-					pw.errorf(l.pos, "//go:linkname must refer to declared function or variable")
-				}
+				pw.errorf(l.pos, "//go:linkname must refer to declared function or variable")
 			}
 		}
 	}
diff --git a/test/run.go b/test/run.go
index 8ef11020da..a4ec19c73c 100644
--- a/test/run.go
+++ b/test/run.go
@@ -1993,10 +1993,9 @@ var _ = setOf(
 )
 
 var unifiedFailures = setOf(
-	"closure3.go",  // unified IR numbers closures differently than -d=inlfuncswithclosures
-	"escape4.go",   // unified IR can inline f5 and f6; test doesn't expect this
-	"inline.go",    // unified IR reports function literal diagnostics on different lines than -d=inlfuncswithclosures
-	"linkname3.go", // unified IR is missing some linkname errors
+	"closure3.go", // unified IR numbers closures differently than -d=inlfuncswithclosures
+	"escape4.go",  // unified IR can inline f5 and f6; test doesn't expect this
+	"inline.go",   // unified IR reports function literal diagnostics on different lines than -d=inlfuncswithclosures
 
 	"fixedbugs/issue7921.go",   // prints "… escapes to heap", but test expects "string(…) escapes to heap"
 	"typeparam/issue47631.go",  // unified IR can handle local type declarations