diff --git a/src/cmd/link/internal/ld/go.go b/src/cmd/link/internal/ld/go.go
index 2930a6b24f..56d2f3f42e 100644
--- a/src/cmd/link/internal/ld/go.go
+++ b/src/cmd/link/internal/ld/go.go
@@ -175,7 +175,7 @@ func loadcgo(ctxt *Link, file string, pkg string, p string) {
 				havedynamic = 1
 
 				if Headtype == objabi.Hdarwin {
-					Machoadddynlib(lib)
+					machoadddynlib(lib)
 				} else {
 					dynlib = append(dynlib, lib)
 				}
diff --git a/src/cmd/link/internal/ld/macho.go b/src/cmd/link/internal/ld/macho.go
index ef4d1552f6..161833f357 100644
--- a/src/cmd/link/internal/ld/macho.go
+++ b/src/cmd/link/internal/ld/macho.go
@@ -380,7 +380,12 @@ func (ctxt *Link) domacho() {
 	}
 }
 
-func Machoadddynlib(lib string) {
+func machoadddynlib(lib string) {
+	if seenlib[lib] || Linkmode == LinkExternal {
+		return
+	}
+	seenlib[lib] = true
+
 	// Will need to store the library name rounded up
 	// and 24 bytes of header metadata. If not enough
 	// space, grab another page of initial space at the