diff --git a/src/map/intif.c b/src/map/intif.c
index 4cb877ca2b..b2ee13dce8 100644
--- a/src/map/intif.c
+++ b/src/map/intif.c
@@ -3220,7 +3220,7 @@ static bool intif_parse_StorageReceived(int fd)
 			status_set_viewdata(&sd->bl, sd->status.class_);
 			pc_load_combo(sd);
 			status_calc_pc(sd, (enum e_status_calc_opt)(SCO_FIRST|SCO_FORCE));
-			status_calc_weight(sd, 1|2); // Refresh item weight data
+			status_calc_weight(sd, CALCWT_ITEM|CALCWT_MAXBONUS); // Refresh weight data
 			chrif_scdata_request(sd->status.account_id, sd->status.char_id);
 			break;
 		}
diff --git a/src/map/pc.c b/src/map/pc.c
index 553336185c..eefeb25ce4 100755
--- a/src/map/pc.c
+++ b/src/map/pc.c
@@ -3024,7 +3024,7 @@ void pc_bonus(struct map_session_data *sd,int type,int val)
 #endif
 		case SP_ADDMAXWEIGHT:
 			if (sd->state.lr_flag != 2)
-				sd->max_weight += val;
+				sd->add_max_weight += val;
 			break;
 		case SP_ABSORB_DMG_MAXHP: // bonus bAbsorbDmgMaxHP,n;
 			sd->bonus.absorb_dmg_maxhp = max(sd->bonus.absorb_dmg_maxhp, val);
@@ -11464,7 +11464,7 @@ void pc_scdata_received(struct map_session_data *sd) {
 
 	if (pc_iscarton(sd)) {
 		sd->cart_weight_max = 0; // Force a client refesh
-		status_calc_cart_weight(sd, 1|2|4);
+		status_calc_cart_weight(sd, CALCWT_ITEM|CALCWT_MAXBONUS|CALCWT_CARTSTATE);
 	}
 }
 
diff --git a/src/map/pc.h b/src/map/pc.h
index 2520ca766d..e6f8fd7e4c 100644
--- a/src/map/pc.h
+++ b/src/map/pc.h
@@ -282,7 +282,7 @@ struct map_session_data {
 
 	struct item_data* inventory_data[MAX_INVENTORY]; // direct pointers to itemdb entries (faster than doing item_id lookups)
 	short equip_index[EQI_MAX];
-	unsigned int weight,max_weight;
+	unsigned int weight,max_weight,add_max_weight;
 	int cart_weight,cart_num,cart_weight_max;
 	int fd;
 	unsigned short mapindex;
diff --git a/src/map/status.c b/src/map/status.c
index f5680c03c0..0c9cc5fc47 100644
--- a/src/map/status.c
+++ b/src/map/status.c
@@ -3118,11 +3118,11 @@ static unsigned int status_calc_maxhpsp_pc(struct map_session_data* sd, unsigned
  * Calculates player's weight
  * @param sd: Player object
  * @param flag: Calculation type
- *   1 - Item weight
- *   2 - Skill/Status/Configuration max weight bonus
+ *   CALCWT_ITEM - Item weight
+ *   CALCWT_MAXBONUS - Skill/Status/Configuration max weight bonus
  * @return false - failed, true - success
  */
-bool status_calc_weight(struct map_session_data *sd, uint8 flag)
+bool status_calc_weight(struct map_session_data *sd, enum e_status_calc_weight_opt flag)
 {
 	int b_weight, b_max_weight, skill, i;
 	struct status_change *sc;
@@ -3134,7 +3134,7 @@ bool status_calc_weight(struct map_session_data *sd, uint8 flag)
 	b_weight = sd->weight; // Store current weight for later comparison
 	sd->max_weight = job_info[pc_class2idx(sd->status.class_)].max_weight_base + sd->status.str * 300; // Recalculate max weight
 
-	if (flag&1) {
+	if (flag&CALCWT_ITEM) {
 		sd->weight = 0; // Reset current weight
 
 		for(i = 0; i < MAX_INVENTORY; i++) {
@@ -3144,8 +3144,9 @@ bool status_calc_weight(struct map_session_data *sd, uint8 flag)
 		}
 	}
 
-	if (flag&2) {
+	if (flag&CALCWT_MAXBONUS) {
 		// Skill/Status bonus weight increases
+		sd->max_weight += sd->add_max_weight; // From bAddMaxWeight
 		if ((skill = pc_checkskill(sd, MC_INCCARRY)) > 0)
 			sd->max_weight += 2000 * skill;
 		if (pc_isriding(sd) && pc_checkskill(sd, KN_RIDING) > 0)
@@ -3173,24 +3174,24 @@ bool status_calc_weight(struct map_session_data *sd, uint8 flag)
  * Calculates player's cart weight
  * @param sd: Player object
  * @param flag: Calculation type
- *   1 - Cart item weight
- *   2 - Skill/Status/Configuration max weight bonus
- *   4 - Whether to check for cart status
+ *   CALCWT_ITEM - Cart item weight
+ *   CALCWT_MAXBONUS - Skill/Status/Configuration max weight bonus
+ *   CALCWT_CARTSTATE - Whether to check for cart state
  * @return false - failed, true - success
  */
-bool status_calc_cart_weight(struct map_session_data *sd, uint8 flag)
+bool status_calc_cart_weight(struct map_session_data *sd, enum e_status_calc_weight_opt flag)
 {
 	int b_cart_weight_max, i;
 
 	nullpo_retr(false, sd);
 
-	if (!pc_iscarton(sd) && !(flag&4))
+	if (!pc_iscarton(sd) && !(flag&CALCWT_CARTSTATE))
 		return false;
 
 	b_cart_weight_max = sd->cart_weight_max; // Store cart max weight for later comparison
 	sd->cart_weight_max = battle_config.max_cart_weight; // Recalculate max weight
 
-	if (flag&1) {
+	if (flag&CALCWT_ITEM) {
 		sd->cart_weight = 0; // Reset current cart weight
 		sd->cart_num = 0; // Reset current cart item count
 
@@ -3203,7 +3204,7 @@ bool status_calc_cart_weight(struct map_session_data *sd, uint8 flag)
 	}
 
 	// Skill bonus max weight increases
-	if (flag&2)
+	if (flag&CALCWT_MAXBONUS)
 		sd->cart_weight_max += (pc_checkskill(sd, GN_REMODELING_CART) * 5000);
 
 	// Update the client if the new weight calculations don't match
@@ -3258,6 +3259,7 @@ int status_calc_pc_(struct map_session_data* sd, enum e_status_calc_opt opt)
 	sd->critical_rate = sd->hit_rate = sd->flee_rate = sd->flee2_rate = 100;
 	sd->def_rate = sd->def2_rate = sd->mdef_rate = sd->mdef2_rate = 100;
 	sd->regen.state.block = 0;
+	sd->add_max_weight = 0;
 
 	// Zeroed arrays, order follows the order in pc.h.
 	// Add new arrays to the end of zeroed area in pc.h (see comments) and size here. [zzo]
@@ -3938,8 +3940,8 @@ int status_calc_pc_(struct map_session_data* sd, enum e_status_calc_opt opt)
 // ----- MISC CALCULATIONS -----
 
 	// Weight
-	status_calc_weight(sd, 2);
-	status_calc_cart_weight(sd, 2);
+	status_calc_weight(sd, CALCWT_MAXBONUS);
+	status_calc_cart_weight(sd, CALCWT_MAXBONUS);
 
 	if (pc_checkskill(sd,SM_MOVINGRECOVERY)>0)
 		sd->regen.state.walk = 1;
diff --git a/src/map/status.h b/src/map/status.h
index 7f2b7e5e17..77c0ff1365 100644
--- a/src/map/status.h
+++ b/src/map/status.h
@@ -2003,6 +2003,14 @@ enum e_status_bonus {
 	STATUS_BONUS_RATE = 1,
 };
 
+/// Enum for status_calc_weight and status_calc_cart_weight
+enum e_status_calc_weight_opt {
+	CALCWT_NONE = 0x0,
+	CALCWT_ITEM = 0x1,		///< Recalculate item weight
+	CALCWT_MAXBONUS = 0x2,	///< Recalculate max weight based on skill/status/configuration bonuses
+	CALCWT_CARTSTATE = 0x4,	///< Whether to check for cart state
+};
+
 ///Define to determine who gets HP/SP consumed on doing skills/etc. [Skotlex]
 #define BL_CONSUME (BL_PC|BL_HOM|BL_MER|BL_ELEM)
 ///Define to determine who has regen
@@ -2277,8 +2285,8 @@ void status_change_clear_onChangeMap(struct block_list *bl, struct status_change
 #define status_calc_elemental(ed, opt) status_calc_bl_(&(ed)->bl, SCB_ALL, opt)
 #define status_calc_npc(nd, opt) status_calc_bl_(&(nd)->bl, SCB_ALL, opt)
 
-bool status_calc_weight(struct map_session_data *sd, uint8 flag);
-bool status_calc_cart_weight(struct map_session_data *sd, uint8 flag);
+bool status_calc_weight(struct map_session_data *sd, enum e_status_calc_weight_opt flag);
+bool status_calc_cart_weight(struct map_session_data *sd, enum e_status_calc_weight_opt flag);
 void status_calc_bl_(struct block_list *bl, enum scb_flag flag, enum e_status_calc_opt opt);
 int status_calc_mob_(struct mob_data* md, enum e_status_calc_opt opt);
 void status_calc_pet_(struct pet_data* pd, enum e_status_calc_opt opt);