diff --git a/net.go b/net.go
index 7864bd0..065159d 100644
--- a/net.go
+++ b/net.go
@@ -31,12 +31,12 @@ type NetConnectionStat struct {
 	Pid    int32  `json:"pid"`
 }
 
-func (n NetConnectionStat) String() string {
+func (n NetIOCountersStat) String() string {
 	s, _ := json.Marshal(n)
 	return string(s)
 }
 
-func (n NetIOCountersStat) String() string {
+func (n NetConnectionStat) String() string {
 	s, _ := json.Marshal(n)
 	return string(s)
 }
diff --git a/process_linux.go b/process_linux.go
index 96d65c5..943d142 100644
--- a/process_linux.go
+++ b/process_linux.go
@@ -10,6 +10,7 @@ import (
 	"strconv"
 	"strings"
 	"syscall"
+	"encoding/json"
 )
 
 const (
@@ -26,6 +27,10 @@ type MemoryInfoExStat struct {
 	Data   uint64 `json:"data"`   // bytes
 	Dirty  uint64 `json:"dirty"`  // bytes
 }
+func (m MemoryInfoExStat) String() string {
+	s, _ := json.Marshal(m)
+	return string(s)
+}
 
 type MemoryMapsStat struct {
 	Path         string `json:"path"`
@@ -41,6 +46,13 @@ type MemoryMapsStat struct {
 	Swap         uint64 `json:"swap"`
 }
 
+func (m MemoryMapsStat) String() string {
+	s, _ := json.Marshal(m)
+	return string(s)
+}
+
+
+
 // Create new Process instance
 // This only stores Pid
 func NewProcess(pid int32) (*Process, error) {