diff --git a/extra/forestdb/ffi/platforms.txt b/extra/forestdb/ffi/platforms.txt
new file mode 100644
index 0000000000..509143d863
--- /dev/null
+++ b/extra/forestdb/ffi/platforms.txt
@@ -0,0 +1 @@
+unix
diff --git a/extra/forestdb/lib/platforms.txt b/extra/forestdb/lib/platforms.txt
new file mode 100644
index 0000000000..509143d863
--- /dev/null
+++ b/extra/forestdb/lib/platforms.txt
@@ -0,0 +1 @@
+unix