diff --git a/bashrc.sh b/bashrc.sh
index 7e51e3b..e1d0854 100644
--- a/bashrc.sh
+++ b/bashrc.sh
@@ -2,6 +2,7 @@
 PATH=$PATH:~/.resh/bin
 export __RESH_RT_SESSION=$EPOCHREALTIME
 export __RESH_RT_SESS_SINCE_BOOT=$(cat /proc/uptime | cut -d' ' -f1)
+export __RESH_SESSION_ID=$RANDOM
 nohup resh-daemon &>/dev/null & disown
 
 preexec() {
@@ -24,7 +25,7 @@ preexec() {
     
     # non-posix
     __RESH_PID="$BASHPID" # current pid
-    __RESH_SESSION_PID="$$" # pid of original shell 
+    __RESH_SHELL_PID="$$" # pid but subshells don't affect it 
     __RESH_WINDOWID="$WINDOWID" # session 
     __RESH_HOST="$HOSTNAME"
     __RESH_HOSTTYPE="$HOSTTYPE"
@@ -54,7 +55,7 @@ precmd() {
                      -pwd "$__RESH_PWD" \
                      -shell "$__RESH_SHELL" \
                      -term "$__RESH_TERM" \
-                     -pid "$__RESH_PID" -sessionPid "$__RESH_SESSION_PID" \
+                     -pid "$__RESH_PID" -shellPid "$__RESH_SHELL_PID" \
                      -windowId "$__RESH_WINDOWID" \
                      -host "$__RESH_HOST" \
                      -hosttype "$__RESH_HOSTTYPE" \
diff --git a/collect/resh-collect.go b/collect/resh-collect.go
index a905d0c..edbfb10 100644
--- a/collect/resh-collect.go
+++ b/collect/resh-collect.go
@@ -45,7 +45,8 @@ func main() {
 
 	// non-posix
 	pid := flag.Int("pid", -1, "$PID")
-	sessionPid := flag.Int("sessionPid", -1, "$$")
+	shellPid := flag.Int("shellPid", -1,
+		"$$ (pid but subshells don't affect it)")
 	windowId := flag.Int("windowId", -1, "$WINDOWID - session id")
 	shlvl := flag.Int("shlvl", -1, "$SHLVL")
 
@@ -104,14 +105,14 @@ func main() {
 		Term:  *term,
 
 		// non-posix
-		Pid:        *pid,
-		SessionPid: *sessionPid,
-		WindowId:   *windowId,
-		Host:       *host,
-		Hosttype:   *hosttype,
-		Ostype:     *ostype,
-		Machtype:   *machtype,
-		Shlvl:      *shlvl,
+		Pid:      *pid,
+		ShellPid: *shellPid,
+		WindowId: *windowId,
+		Host:     *host,
+		Hosttype: *hosttype,
+		Ostype:   *ostype,
+		Machtype: *machtype,
+		Shlvl:    *shlvl,
 
 		// before after
 		TimezoneBefore: *timezoneBefore,
@@ -127,7 +128,7 @@ func main() {
 		RealtimeSinceBoot:         realtimeSinceBoot,
 
 		GitWorkTree: getGitDir(),
-		MachineId: getMachineId(),
+		MachineId:   getMachineId(),
 	}
 	sendRecord(rec, strconv.Itoa(config.Port))
 }
diff --git a/common/resh-common.go b/common/resh-common.go
index 6221008..f1d87e1 100644
--- a/common/resh-common.go
+++ b/common/resh-common.go
@@ -19,7 +19,7 @@ type Record struct {
 
     // non-posix"`
     Pid int `json:"pid"`
-    SessionPid int `json:"sessionPid"`
+    ShellPid int `json:"shellPid"`
     WindowId int `json:"windowId"`
     Host string `json:"host"`
     Hosttype string `json:"hosttype"`