diff --git a/src/eir.c b/src/eir.c
index 91c431f..e006a9f 100644
--- a/src/eir.c
+++ b/src/eir.c
@@ -278,7 +278,7 @@ static void eir_generate_uuid128(GSList *list, uint8_t *ptr, uint16_t *eir_len)
 	}
 }
 
-void eir_create(const char *name, int8_t tx_power,
+void eir_create(const char *name, int8_t tx_power, uint32_t cod,
 			uint8_t *hash, uint8_t *randomizer,
 			uint16_t did_vendor, uint16_t did_product,
 			uint16_t did_version, uint16_t did_source,
@@ -292,6 +292,22 @@ void eir_create(const char *name, int8_t tx_power,
 	gboolean truncated = FALSE;
 	size_t name_len;
 
+	if (cod > 0) {
+		uint8_t class[3];
+
+		class[0] = (uint8_t) cod;
+		class[1] = (uint8_t) (cod >> 8);
+		class[2] = (uint8_t) (cod >> 16);
+
+		*ptr++ = 4;
+		*ptr++ = EIR_CLASS_OF_DEV;
+
+		memcpy(ptr, class, sizeof(class));
+		ptr += sizeof(class);
+
+		eir_len += sizeof(class) + 2;
+	}
+
 	if (hash) {
 		*ptr++ = 17;
 		*ptr++ = EIR_SSP_HASH;
diff --git a/src/eir.h b/src/eir.h
index 844c162..1c7a603 100644
--- a/src/eir.h
+++ b/src/eir.h
@@ -58,7 +58,7 @@ struct eir_data {
 void eir_data_free(struct eir_data *eir);
 int eir_parse(struct eir_data *eir, uint8_t *eir_data, uint8_t eir_len);
 int eir_parse_oob(struct eir_data *eir, uint8_t *eir_data, uint16_t eir_len);
-void eir_create(const char *name, int8_t tx_power,
+void eir_create(const char *name, int8_t tx_power, uint32_t cod,
 			uint8_t *hash, uint8_t *randomizer,
 			uint16_t did_vendor, uint16_t did_product,
 			uint16_t did_version, uint16_t did_source,