diff --git a/autogen.sh b/autogen.sh
index 9186c16..22e2759 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-ccan_modules=talloc read-write-all
+ccan_modules="talloc read_write_all"
 
 # Add ccan upstream sources
 if [ ! -e lib/ccan.git/Makefile ]