diff --git a/.gitmodules b/.gitmodules
index 52b975e..91fd005 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "refptr"]
 	path = refptr
-	url = ../refptr.git
+	url = http://github.com/holtrop/refptr.git
diff --git a/refptr b/refptr
new file mode 160000
index 0000000..e2c7e88
--- /dev/null
+++ b/refptr
@@ -0,0 +1 @@
+Subproject commit e2c7e88824c18eb3b218f6308db0194edb422eef