diff --git a/rackspace/lb/v1/common.go b/rackspace/lb/v1/common.go
new file mode 100644
index 0000000..89d9361
--- /dev/null
+++ b/rackspace/lb/v1/common.go
@@ -0,0 +1,22 @@
+package v1
+
+import (
+	"fmt"
+	"strconv"
+)
+
+// IDSliceToQueryString takes a slice of elements and converts them into a query
+// string. For example, if name=foo and slice=[]int{20, 40, 60}, then the
+// result would be `?name=20&name=40&name=60'
+func IDSliceToQueryString(name string, ids []int) string {
+	str := ""
+	for k, v := range ids {
+		if k == 0 {
+			str += "?"
+		} else {
+			str += "&"
+		}
+		str += fmt.Sprintf("%s=%s", name, strconv.Itoa(v))
+	}
+	return str
+}