diff --git a/src/cmd/link/internal/ld/symtab.go b/src/cmd/link/internal/ld/symtab.go
index 02b384ba9dfeff..5074ffa8c9e743 100644
--- a/src/cmd/link/internal/ld/symtab.go
+++ b/src/cmd/link/internal/ld/symtab.go
@@ -684,8 +684,12 @@ func (ctxt *Link) symtab(pcln *pclntab) []sym.SymKind {
 		// Add R_XCOFFREF relocation to prevent ld's garbage collection of
 		// the following symbols. They might not be referenced in the program.
 		addRef := func(name string) {
+			s := ldr.Lookup(name, 0)
+			if s == 0 {
+				return
+			}
 			r, _ := moduledata.AddRel(objabi.R_XCOFFREF)
-			r.SetSym(ldr.Lookup(name, 0))
+			r.SetSym(s)
 			r.SetSiz(uint8(ctxt.Arch.PtrSize))
 		}
 		addRef("runtime.rodata")
diff --git a/test/fixedbugs/bug514.go b/test/fixedbugs/bug514.go
index 1a6c7f14dd784a..9b231853378258 100644
--- a/test/fixedbugs/bug514.go
+++ b/test/fixedbugs/bug514.go
@@ -4,7 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build cgo && !aix
+//go:build cgo
 
 package main
 
diff --git a/test/fixedbugs/issue40954.go b/test/fixedbugs/issue40954.go
index e268b808ca1423..0beaabb7439755 100644
--- a/test/fixedbugs/issue40954.go
+++ b/test/fixedbugs/issue40954.go
@@ -4,7 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build cgo && !aix
+//go:build cgo
 
 package main
 
diff --git a/test/fixedbugs/issue42032.go b/test/fixedbugs/issue42032.go
index 68fbc890458cf7..eb118591019e73 100644
--- a/test/fixedbugs/issue42032.go
+++ b/test/fixedbugs/issue42032.go
@@ -4,7 +4,7 @@
 // source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
-//go:build cgo && !aix
+//go:build cgo
 
 package main
 
diff --git a/test/fixedbugs/issue42076.go b/test/fixedbugs/issue42076.go
index b958d0eeb50b50..ef8db2da30d685 100644
--- a/test/fixedbugs/issue42076.go
+++ b/test/fixedbugs/issue42076.go
@@ -4,7 +4,7 @@
 // source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
-//go:build cgo && !aix
+//go:build cgo
 
 package main
 
diff --git a/test/fixedbugs/issue46903.go b/test/fixedbugs/issue46903.go
index 90ceb9a86c2e65..28cb43df3bab44 100644
--- a/test/fixedbugs/issue46903.go
+++ b/test/fixedbugs/issue46903.go
@@ -1,5 +1,5 @@
 // run
-//go:build goexperiment.unified && cgo && !aix
+//go:build goexperiment.unified && cgo
 
 // TODO(mdempsky): Enable test unconditionally. This test should pass
 // for non-unified mode too.
diff --git a/test/fixedbugs/issue51733.go b/test/fixedbugs/issue51733.go
index 757ef733c3fff8..933c3e868c0545 100644
--- a/test/fixedbugs/issue51733.go
+++ b/test/fixedbugs/issue51733.go
@@ -4,7 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build cgo && !aix
+//go:build cgo
 
 package main