diff --git a/src/kernel/core/cache/file_cache.cpp b/src/kernel/core/cache/file_cache.cpp
index 7ec1e63df6..59f62d6773 100644
--- a/src/kernel/core/cache/file_cache.cpp
+++ b/src/kernel/core/cache/file_cache.cpp
@@ -485,6 +485,14 @@ file_cache_set_size(void *_cacheRef, off_t size)
 }
 
 
+extern "C" status_t
+file_cache_sync(void *_cacheRef)
+{
+	// ToDo: implement me!
+	return B_ERROR;
+}
+
+
 extern "C" status_t
 file_cache_read_pages(void *_cacheRef, off_t offset, const iovec *vecs, size_t count, size_t *_numBytes)
 {