diff --git a/contracts/hdddeposit/hdddeposit.abi b/contracts/hdddeposit/hdddeposit.abi
index 56685870ab9c2acff85a691bfde8291a8c4f184f..638130bef70ca95abafdbf628c318a71747a1dd6 100644
--- a/contracts/hdddeposit/hdddeposit.abi
+++ b/contracts/hdddeposit/hdddeposit.abi
@@ -126,7 +126,7 @@
                     "type": "uint64"
                 },
                 {
-                    "name": "is_increace",
+                    "name": "is_increase",
                     "type": "bool"
                 },
                 {
diff --git a/contracts/hdddeposit/hdddeposit.cpp b/contracts/hdddeposit/hdddeposit.cpp
index b0aa1e3c39d2b252f3a8825d09878bc6eb157b13..1541f394fa75fb94d45e70f17cedd3ef83c13455 100644
--- a/contracts/hdddeposit/hdddeposit.cpp
+++ b/contracts/hdddeposit/hdddeposit.cpp
@@ -135,7 +135,7 @@ void hdddeposit::paydeposit(account_name user, uint64_t minerid, asset quant) {
     }
 }
 
-void hdddeposit::chgdeposit(name user, uint64_t minerid, bool is_increace, asset quant) {
+void hdddeposit::chgdeposit(name user, uint64_t minerid, bool is_increase, asset quant) {
     require_auth(user); // need hdd official account to sign this action.
 
     eosio_assert(quant.symbol == CORE_SYMBOL, "must use core asset for hdd deposit.");
@@ -148,7 +148,7 @@ void hdddeposit::chgdeposit(name user, uint64_t minerid, bool is_increace, asset
     depositpool_table _deposit(_self, user);
     const auto& acc = _deposit.get( user.value, "no deposit pool record for this user.");
 
-    if(!is_increace) {
+    if(!is_increase) {
         eosio_assert( miner.deposit.amount >= quant.amount, "overdrawn deposit." );
 
         _mdeposit.modify( miner, 0, [&]( auto& a ) {
diff --git a/contracts/hdddeposit/hdddeposit.hpp b/contracts/hdddeposit/hdddeposit.hpp
index 231af0a74b4eface05bd63e79f8729d099ef43f2..77478547fa200aa2ca1f4972750170a304fa5640 100644
--- a/contracts/hdddeposit/hdddeposit.hpp
+++ b/contracts/hdddeposit/hdddeposit.hpp
@@ -20,7 +20,7 @@ class hdddeposit : public eosio::contract {
         void unpaydeppool(account_name user, asset quant);
 
         void paydeposit(account_name user, uint64_t minerid, asset quant);
-        void chgdeposit(name user, uint64_t minerid, bool is_increace, asset quant);
+        void chgdeposit(name user, uint64_t minerid, bool is_increase, asset quant);
         void payforfeit(name user, uint64_t minerid, asset quant, uint8_t acc_type, name caller);
         void delminer(uint64_t minerid);
         void setrate(int64_t rate);
diff --git a/contracts/hddpool/hddpool.abi b/contracts/hddpool/hddpool.abi
index 90fda845b7742afe24d27c96894e8ba96eb35b4f..1c8b44a8355ec126c873b1566e553cb0a7c51dc1 100644
--- a/contracts/hddpool/hddpool.abi
+++ b/contracts/hddpool/hddpool.abi
@@ -129,7 +129,7 @@
                     "type": "name"
                 },
                 {
-                    "name": "is_increace",
+                    "name": "is_increase",
                     "type": "bool"
                 },
                 {
diff --git a/contracts/hddpool/hddpool.cpp b/contracts/hddpool/hddpool.cpp
index d15398af56da5606a026035e2304fef9f7c4f894..8ccfc34e23b32b58e90f508299818a855f602442 100644
--- a/contracts/hddpool/hddpool.cpp
+++ b/contracts/hddpool/hddpool.cpp
@@ -608,7 +608,7 @@ void hddpool::regstrpool(name pool_id, name pool_owner)
        .send();
 }
 
-void hddpool::chgpoolspace(name pool_id, bool is_increace, uint64_t delta_space)
+void hddpool::chgpoolspace(name pool_id, bool is_increase, uint64_t delta_space)
 { 
    require_auth(N(hddpooladml2));
 
@@ -617,7 +617,7 @@ void hddpool::chgpoolspace(name pool_id, bool is_increace, uint64_t delta_space)
    eosio_assert(itmstorepool != _storepool.end(), "storepool not exist");  
 
    uint64_t max_space = 0;
-   if(is_increace) {
+   if(is_increase) {
       max_space = itmstorepool->max_space + delta_space;
    } else {
       if(itmstorepool->max_space > delta_space) {
diff --git a/contracts/hddpool/hddpool.hpp b/contracts/hddpool/hddpool.hpp
index 5abe053df418d2cb31dd1e5b848c95700453c92d..15aab4790aa17d998cf504846a9072a9e0108c25 100644
--- a/contracts/hddpool/hddpool.hpp
+++ b/contracts/hddpool/hddpool.hpp
@@ -39,7 +39,7 @@ public:
   //store pool related actions -- start
   void delstrpool(name poolid);
   void regstrpool(name pool_id, name pool_owner);
-  void chgpoolspace(name pool_id, bool is_increace, uint64_t delta_space);
+  void chgpoolspace(name pool_id, bool is_increase, uint64_t delta_space);
   void addm2pool(uint64_t minerid, name pool_id, name minerowner, uint64_t max_space);
   //store pool related actions -- end