diff --git a/event.go b/event.go
index f62431cb61d7ff5fee366890cf0b16d582af0de8..c8ae46f4a3c39a3adbc552b42bb5c4f425038f8f 100644
--- a/event.go
+++ b/event.go
@@ -11,10 +11,3 @@ type FileEvent struct {
 
   fileinfo *os.FileInfo
 }
-
-type FileState struct {
-  Source *string `json:"source,omitempty"`
-  Offset int64 `json:"offset,omitempty"`
-  Inode uint64 `json:"inode,omitempty"`
-  Device uint64 `json:"device,omitempty"`
-}
diff --git a/filestate_darwin.go b/filestate_darwin.go
new file mode 100644
index 0000000000000000000000000000000000000000..b22e994e93cc3001822105b4e1917396a93bf171
--- /dev/null
+++ b/filestate_darwin.go
@@ -0,0 +1,8 @@
+package main
+
+type FileState struct {
+  Source *string `json:"source,omitempty"`
+  Offset int64 `json:"offset,omitempty"`
+  Inode uint64 `json:"inode,omitempty"`
+  Device int32 `json:"device,omitempty"`
+}
diff --git a/filestate_linux.go b/filestate_linux.go
new file mode 100644
index 0000000000000000000000000000000000000000..908e65aab9fcd9ee5c4a815a47e95742d820b15a
--- /dev/null
+++ b/filestate_linux.go
@@ -0,0 +1,8 @@
+package main
+
+type FileState struct {
+  Source *string `json:"source,omitempty"`
+  Offset int64 `json:"offset,omitempty"`
+  Inode uint64 `json:"inode,omitempty"`
+  Device uint64 `json:"device,omitempty"`
+}