diff --git a/c_gen/c_code_gen.py b/c_gen/c_code_gen.py
index 3621507..fbd9826 100644
--- a/c_gen/c_code_gen.py
+++ b/c_gen/c_code_gen.py
@@ -697,6 +697,11 @@
     uint64_t lo;
 } of_bitmap_128_t;
 
+typedef struct of_checksum_128_s {
+    uint64_t hi;
+    uint64_t lo;
+} of_checksum_128_t;
+
 /* These are types which change across versions.  */
 typedef uint32_t of_port_no_t;
 typedef uint16_t of_fm_cmd_t;
diff --git a/c_gen/c_test_gen.py b/c_gen/c_test_gen.py
index ac2845f..4c531be 100644
--- a/c_gen/c_test_gen.py
+++ b/c_gen/c_test_gen.py
@@ -99,6 +99,7 @@
         # BSN extensions
         of_bsn_vport_q_in_q_t="vport",
         of_bitmap_128_t="bitmap_128",
+        of_checksum_128_t="checksum_128",
         )
 
     if m_type.find("of_list_") == 0:
@@ -112,7 +113,7 @@
                  "of_match_bmap_t", "of_ipv4_t"]
 string_types = [ "of_port_name_t", "of_table_name_t",
                 "of_desc_str_t", "of_serial_num_t", "of_mac_addr_t",
-                "of_ipv6_t", "of_bitmap_128_t"]
+                "of_ipv6_t", "of_bitmap_128_t", "of_checksum_128_t"]
 
 scalar_types = integer_types[:]
 scalar_types.extend(string_types)
diff --git a/c_gen/of_g_legacy.py b/c_gen/of_g_legacy.py
index 6f0947c..08f13ef 100644
--- a/c_gen/of_g_legacy.py
+++ b/c_gen/of_g_legacy.py
@@ -206,13 +206,14 @@
 #                         short_name="match_v4"),
     of_octets_t = dict(bytes=-1, short_name="octets"),
     of_bitmap_128_t = dict(bytes=16, short_name="bitmap_128"),
+    of_checksum_128_t = dict(bytes=16, short_name="checksum_128"),
 )
 
 of_scalar_types = ["char", "uint8_t", "uint16_t", "uint32_t", "uint64_t",
                    "of_port_no_t", "of_fm_cmd_t", "of_wc_bmap_t",
                    "of_match_bmap_t", "of_port_name_t", "of_table_name_t",
                    "of_desc_str_t", "of_serial_num_t", "of_mac_addr_t",
-                   "of_ipv6_t", "of_ipv4_t", "of_bitmap_128_t"]
+                   "of_ipv6_t", "of_ipv4_t", "of_bitmap_128_t", "of_checksum_128_t"]
 
 ##
 # LOXI identifiers
diff --git a/c_gen/templates/loci_dump.h b/c_gen/templates/loci_dump.h
index d44832a..9cc719c 100644
--- a/c_gen/templates/loci_dump.h
+++ b/c_gen/templates/loci_dump.h
@@ -96,6 +96,8 @@
 
 #define LOCI_DUMP_bitmap_128(writer, cookie, val) writer(cookie, "%" PRIx64 "%" PRIx64, (val).hi, (val).lo)
 
+#define LOCI_DUMP_checksum_128(writer, cookie, val) writer(cookie, "%016" PRIx64 "%016" PRIx64, (val).hi, (val).lo)
+
 /**
  * Generic version for any object
  */
diff --git a/c_gen/templates/loci_show.h b/c_gen/templates/loci_show.h
index a66c321..8241f3e 100644
--- a/c_gen/templates/loci_show.h
+++ b/c_gen/templates/loci_show.h
@@ -164,6 +164,8 @@
 
 #define LOCI_SHOW_bitmap_128(writer, cookie, val) writer(cookie, "%" PRIx64 "%" PRIx64, (val).hi, (val).lo)
 
+#define LOCI_SHOW_checksum_128(writer, cookie, val) writer(cookie, "%016" PRIx64 "%016" PRIx64, (val).hi, (val).lo)
+
 /**
  * Generic version for any object
  */
diff --git a/c_gen/templates/of_wire_buf.h b/c_gen/templates/of_wire_buf.h
index 117332c..f977004 100644
--- a/c_gen/templates/of_wire_buf.h
+++ b/c_gen/templates/of_wire_buf.h
@@ -900,6 +900,26 @@
 #define of_wire_buffer_bitmap_128_set(buf, offset, addr) \
     (of_wire_buffer_u64_set(buf, offset, addr.hi), of_wire_buffer_u64_set(buf, offset+8, addr.lo))
 
+/**
+ * Get a checksum_128 from a wire buffer
+ * @param wbuf The pointer to the wire buffer structure
+ * @param offset Offset in the wire buffer
+ * @param checksum Pointer to where to store the checksum_128
+ */
+
+#define of_wire_buffer_checksum_128_get(buf, offset, checksum) \
+    (of_wire_buffer_u64_get(buf, offset, &checksum->hi), of_wire_buffer_u64_get(buf, offset+8, &checksum->lo))
+
+/**
+ * Set a checksum_128 in a wire buffer
+ * @param wbuf The pointer to the wire buffer structure
+ * @param offset Offset in the wire buffer
+ * @param checksum The variable holding checksum_128 to store
+ */
+
+#define of_wire_buffer_checksum_128_set(buf, offset, checksum) \
+    (of_wire_buffer_u64_set(buf, offset, checksum.hi), of_wire_buffer_u64_set(buf, offset+8, checksum.lo))
+
 /* Relocate data from start offset to the end of the buffer to a new position */
 static inline void
 of_wire_buffer_move_end(of_wire_buffer_t *wbuf, int start_offset, int new_offset)