diff --git a/README.md b/README.md
index c8d0ff3ef7933cc29ed7aa49daaa18aa58bbb274..ebff4b74f9a184f4786cf345e64f09a469c01289 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,7 @@ Consult the docs for how to disable it.
 
 * fixed a bug with slicing chunks
 * added extra comparison operators for `VarlenEntry`
+* added `sync` to `VarlenSeries`
 
 ## v0.6.3
 
diff --git a/tempsdb/series.pyx b/tempsdb/series.pyx
index 0d248e2589356706ece8dc423af431c5ad1c7243..c33cc2c7c49f80823baa27c6150fe492abfa8484 100644
--- a/tempsdb/series.pyx
+++ b/tempsdb/series.pyx
@@ -267,13 +267,6 @@ cdef class TimeSeries:
                 pass
         return 0
 
-    cpdef int sync(self) except -1:
-        """
-        Make sure that all data written up to this point is persisted on disk.
-        """
-        self.last_chunk.sync()
-        return 0
-
     cpdef int close(self) except -1:
         """
         Close the series.
diff --git a/tempsdb/varlen.pxd b/tempsdb/varlen.pxd
index b3b9a10581a5a9df46f541d49e9c3e9667d04113..75d02433c1c542ce64267d10f17b16fff94b6cc9 100644
--- a/tempsdb/varlen.pxd
+++ b/tempsdb/varlen.pxd
@@ -18,6 +18,7 @@ cdef class VarlenSeries:
         int gzip_level
         bint mmap_enabled
 
+    cpdef int sync(self) except -1
     cpdef int enable_mmap(self) except -1
     cpdef int disable_mmap(self) except -1
     cpdef unsigned long open_chunks_mmap_size(self)
@@ -70,6 +71,7 @@ cdef class VarlenEntry:
     cpdef bint startswith(self, bytes v) except -1
     cpdef int close(self) except -1
 
+
 cpdef VarlenSeries create_varlen_series(str path, str name, int size_struct, list length_profile,
                                         int max_entries_per_chunk,
                                         bint use_descriptor_based_access=*,
diff --git a/tempsdb/varlen.pyx b/tempsdb/varlen.pyx
index 289e0b32540fff070f9d7226615053ee9151a094..13883b345a8f73058bed69ba38f490bf422e57c6 100644
--- a/tempsdb/varlen.pyx
+++ b/tempsdb/varlen.pyx
@@ -456,6 +456,16 @@ cdef class VarlenSeries:
     :param path: path to directory containing the series
     :param name: name of the series
     """
+    cpdef int sync(self) except -1:
+        """
+        Make sure that all data written up to this point is persisted on disk.
+        """
+        self.root_series.sync()
+        cdef TimeSeries series
+        for series in self.series:
+            series.sync()
+        return 0
+
     cdef void register_memory_pressure_manager(self, object mpm):
         self.mpm = mpm
         cdef TimeSeries series
@@ -568,16 +578,6 @@ cdef class VarlenSeries:
 
         self.current_maximum_length = tot_length
 
-    cpdef int sync(self) except -1:
-        """
-        Make sure that all data written up to this point is persisted on disk.
-        """
-        self.root_series.sync()
-        cdef TimeSeries series
-        for series in self.series:
-            series.sync()
-        return 0
-
     cpdef int enable_mmap(self) except -1:
         """
         Enable using mmap for these series