diff --git a/src/fs_local.c b/src/fs_local.c
index 3330282..a331df5 100644
--- a/src/fs_local.c
+++ b/src/fs_local.c
@@ -26,6 +26,10 @@
 
 #define ISO_LOCAL_FS_ID     1
 
+
+static
+int iso_file_source_new_lfs(const char *path, IsoFileSource **src);
+
 /*
  * We can share a local filesystem object, as it has no private atts.
  */
@@ -421,6 +425,7 @@ IsoFileSourceIface lfs_class = {
  * @return
  *     1 success, < 0 error
  */
+static
 int iso_file_source_new_lfs(const char *path, IsoFileSource **src)
 {
     IsoFileSource *lfs_src;
diff --git a/src/fsource.h b/src/fsource.h
index 5dfc463..1961f8c 100644
--- a/src/fsource.h
+++ b/src/fsource.h
@@ -331,13 +331,6 @@ IsoFilesystem* iso_file_source_get_filesystem(IsoFileSource *src)
     return src->class->get_filesystem(src);
 }
 
-/**
- * Create a new IsoFileSource from a local filesystem path.
- * While this is usually called by corresponding method in IsoFilesystem
- * object, for local filesystem it is legal to call this directly.
- */
-int iso_file_source_new_lfs(const char *path, IsoFileSource **src);
-
 void iso_filesystem_ref(IsoFilesystem *fs);
 void iso_filesystem_unref(IsoFilesystem *fs);