diff --git a/src/cmd/cover/cover.go b/src/cmd/cover/cover.go
index e04c8834bd..360f9aeb06 100644
--- a/src/cmd/cover/cover.go
+++ b/src/cmd/cover/cover.go
@@ -293,6 +293,11 @@ func (f *File) Visit(node ast.Node) ast.Visitor {
 			ast.Walk(f, n.Assign)
 			return nil
 		}
+	case *ast.FuncDecl:
+		// Don't annotate functions with blank names - they cannot be executed.
+		if n.Name.Name == "_" {
+			return nil
+		}
 	}
 	return f
 }
diff --git a/src/cmd/go/testdata/script/cover_blank_func_decl.txt b/src/cmd/go/testdata/script/cover_blank_func_decl.txt
new file mode 100644
index 0000000000..6fac4f87ea
--- /dev/null
+++ b/src/cmd/go/testdata/script/cover_blank_func_decl.txt
@@ -0,0 +1,31 @@
+[short] skip
+go test -cover ./coverblank
+stdout 'coverage: 100.0% of statements'
+
+
+-- coverblank/a.go --
+package coverblank
+
+func _() {
+	println("unreachable")
+}
+
+type X int
+
+func (x X) Print() {
+	println(x)
+}
+
+func (x X) _() {
+	println("unreachable")
+}
+
+-- coverblank/a_test.go --
+package coverblank
+
+import "testing"
+
+func TestX(t *testing.T) {
+	var x X
+	x.Print()
+}