diff --git a/pkg/compiler/compiler.go b/pkg/compiler/compiler.go
index 7e47f844d..ec5886728 100644
--- a/pkg/compiler/compiler.go
+++ b/pkg/compiler/compiler.go
@@ -448,7 +448,7 @@ func CompileAndSave(src string, o *Options) ([]byte, error) {
 	return f.Script, nil
 }
 
-// CreateManifest creates manifest and checks that is is valid.
+// CreateManifest creates manifest and checks that is valid.
 func CreateManifest(di *DebugInfo, o *Options) (*manifest.Manifest, error) {
 	m, err := di.ConvertToManifest(o)
 	if err != nil {
diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index fcfc1eec0..1d24d22fa 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -76,7 +76,7 @@ const (
 	// newStorageItemsAdded means that contract storage items are up-to-date with the current
 	// state.
 	newStorageItemsAdded
-	// staleBlocksRemoved means that state corresponding to the stale blocks (genesis block in
+	// staleBlocksRemoved means that state corresponding to the stale blocks (genesis block
 	// in case of state jump) was removed from the storage.
 	staleBlocksRemoved
 	// headersReset denotes stale SYS-prefixed and IX-prefixed information was removed from
diff --git a/pkg/core/mempool/mem_pool.go b/pkg/core/mempool/mem_pool.go
index b9fdbbf3c..1eb832911 100644
--- a/pkg/core/mempool/mem_pool.go
+++ b/pkg/core/mempool/mem_pool.go
@@ -37,7 +37,7 @@ var (
 	ErrOracleResponse = errors.New("conflicts with memory pool due to OracleResponse attribute")
 )
 
-// item represents a transaction in the the Memory pool.
+// item represents a transaction in the Memory pool.
 type item struct {
 	txn        *transaction.Transaction
 	blockStamp uint32
diff --git a/pkg/rpcclient/nep11/divisible.go b/pkg/rpcclient/nep11/divisible.go
index 59600048a..ea16a0543 100644
--- a/pkg/rpcclient/nep11/divisible.go
+++ b/pkg/rpcclient/nep11/divisible.go
@@ -48,7 +48,7 @@ func NewDivisible(actor Actor, hash util.Uint160) *Divisible {
 	return &Divisible{*NewDivisibleReader(actor, hash), DivisibleWriter{BaseWriter{hash, actor}}}
 }
 
-// OwnerOf returns returns an iterator that allows to walk through all owners of
+// OwnerOf returns an iterator that allows to walk through all owners of
 // the given token. It depends on the server to provide proper session-based
 // iterator, but can also work with expanded one.
 func (t *DivisibleReader) OwnerOf(token []byte) (*OwnerIterator, error) {
diff --git a/pkg/services/rpcsrv/params/types.go b/pkg/services/rpcsrv/params/types.go
index 2ce86d876..c2283c1bb 100644
--- a/pkg/services/rpcsrv/params/types.go
+++ b/pkg/services/rpcsrv/params/types.go
@@ -84,8 +84,7 @@ func (r *Request) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
-// DecodeData decodes the given reader into the the request
-// struct.
+// DecodeData decodes the given reader into the request struct.
 func (r *Request) DecodeData(data io.ReadCloser) error {
 	defer data.Close()
 
diff --git a/pkg/vm/stackitem/item.go b/pkg/vm/stackitem/item.go
index 0b793d291..4c480a40e 100644
--- a/pkg/vm/stackitem/item.go
+++ b/pkg/vm/stackitem/item.go
@@ -1124,7 +1124,7 @@ func (p *Pointer) Position() int {
 	return p.pos
 }
 
-// Buffer represents represents a Buffer stack item.
+// Buffer represents a Buffer stack item.
 type Buffer []byte
 
 // NewBuffer returns a new Buffer object.