diff --git a/lib/ct-dpif.c b/lib/ct-dpif.c
index 4d5263157..d255a7150 100644
--- a/lib/ct-dpif.c
+++ b/lib/ct-dpif.c
@@ -108,6 +108,17 @@ ct_dpif_dump_done(struct ct_dpif_dump_state *dump)
             : EOPNOTSUPP);
 }
 
+/* Flush the entries in the connection tracker used by 'dpif'.
+ *
+ * If 'zone' is not NULL, flush only the entries in '*zone'. */
+int
+ct_dpif_flush(struct dpif *dpif, const uint16_t *zone)
+{
+    return (dpif->dpif_class->ct_flush
+            ? dpif->dpif_class->ct_flush(dpif, zone)
+            : EOPNOTSUPP);
+}
+
 void
 ct_dpif_entry_uninit(struct ct_dpif_entry *entry)
 {
diff --git a/lib/ct-dpif.h b/lib/ct-dpif.h
index 6c452a679..47663c752 100644
--- a/lib/ct-dpif.h
+++ b/lib/ct-dpif.h
@@ -179,6 +179,7 @@ int ct_dpif_dump_start(struct dpif *, struct ct_dpif_dump_state **,
                        const uint16_t *zone);
 int ct_dpif_dump_next(struct ct_dpif_dump_state *, struct ct_dpif_entry *);
 int ct_dpif_dump_done(struct ct_dpif_dump_state *);
+int ct_dpif_flush(struct dpif *, const uint16_t *zone);
 void ct_dpif_entry_uninit(struct ct_dpif_entry *);
 void ct_dpif_format_entry(const struct ct_dpif_entry *, struct ds *,
                           bool verbose, bool print_stats);
diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 3e626308f..3efbed019 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -3688,6 +3688,7 @@ const struct dpif_class dpif_netdev_class = {
     NULL,                       /* ct_dump_start */
     NULL,                       /* ct_dump_next */
     NULL,                       /* ct_dump_done */
+    NULL,                       /* ct_flush */
 };
 
 static void
diff --git a/lib/dpif-netlink.c b/lib/dpif-netlink.c
index bf81e6131..fa995c113 100644
--- a/lib/dpif-netlink.c
+++ b/lib/dpif-netlink.c
@@ -2322,6 +2322,7 @@ const struct dpif_class dpif_netlink_class = {
     NULL,                       /* ct_dump_start */
     NULL,                       /* ct_dump_next */
     NULL,                       /* ct_dump_done */
+    NULL,                       /* ct_flush */
 };
 
 static int
diff --git a/lib/dpif-provider.h b/lib/dpif-provider.h
index f00e63563..a9844be9e 100644
--- a/lib/dpif-provider.h
+++ b/lib/dpif-provider.h
@@ -415,6 +415,10 @@ struct dpif_class {
     int (*ct_dump_next)(struct dpif *, struct ct_dpif_dump_state *,
                         struct ct_dpif_entry *entry);
     int (*ct_dump_done)(struct dpif *, struct ct_dpif_dump_state *state);
+
+    /* Flushes the connection tracking tables. If 'zone' is not NULL,
+     * only deletes connections in '*zone'. */
+    int (*ct_flush)(struct dpif *, const uint16_t *zone);
 };
 
 extern const struct dpif_class dpif_netlink_class;