diff --git a/misc/cgo/test/cgo_test.go b/misc/cgo/test/cgo_test.go
index fd21f6802b..f015ec9fa3 100644
--- a/misc/cgo/test/cgo_test.go
+++ b/misc/cgo/test/cgo_test.go
@@ -50,6 +50,7 @@ func TestFpVar(t *testing.T)               { testFpVar(t) }
 func Test4339(t *testing.T)                { test4339(t) }
 func Test6390(t *testing.T)                { test6390(t) }
 func Test5986(t *testing.T)                { test5986(t) }
+func Test7665(t *testing.T)                { test7665(t) }
 func TestNaming(t *testing.T)              { testNaming(t) }
 
 func BenchmarkCgoCall(b *testing.B) { benchCgoCall(b) }
diff --git a/misc/cgo/test/issue7665.go b/misc/cgo/test/issue7665.go
new file mode 100644
index 0000000000..4f36dce756
--- /dev/null
+++ b/misc/cgo/test/issue7665.go
@@ -0,0 +1,25 @@
+// Copyright 2013 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.
+
+package cgotest
+
+import (
+	"testing"
+	"unsafe"
+)
+
+// extern void f7665(void);
+import "C"
+
+//export f7665
+func f7665() {}
+
+var bad7665 unsafe.Pointer = C.f7665
+var good7665 uintptr = uintptr(C.f7665)
+
+func test7665(t *testing.T) {
+	if bad7665 == nil || bad7665 != unsafe.Pointer(good7665) {
+		t.Errorf("ptrs = %p, %#x, want same non-nil pointer", bad7665, good7665)
+	}
+}
diff --git a/src/cmd/gc/sinit.c b/src/cmd/gc/sinit.c
index 973f8efb03..e285352306 100644
--- a/src/cmd/gc/sinit.c
+++ b/src/cmd/gc/sinit.c
@@ -286,8 +286,8 @@ staticcopy(Node *l, Node *r, NodeList **out)
 
 	if(r->op != ONAME || r->class != PEXTERN || r->sym->pkg != localpkg)
 		return 0;
-	if(r->defn == N)	// zeroed
-		return 1;
+	if(r->defn == N)	// probably zeroed but perhaps supplied externally and of unknown value
+		return 0;
 	if(r->defn->op != OAS)
 		return 0;
 	orig = r;