diff --git a/doc.md b/doc.md
index 59815ac..f7be2b6 100644
--- a/doc.md
+++ b/doc.md
@@ -56,7 +56,7 @@
 ##[Window](#Window)
     This is a work in progress.
 
-#####[ShowAlert(support linux as soon as possible)](#ShowAlert)
+#####[ShowAlert](#ShowAlert)
 #####[CloseWindow](#CloseWindow)
 #####[IsValid](#IsValid)
 #####[SetActive](#SetActive)
diff --git a/doc_zh.md b/doc_zh.md
index a23b796..9e39ef5 100644
--- a/doc_zh.md
+++ b/doc_zh.md
@@ -59,7 +59,7 @@
 ##[窗口](#Window)
     This is a work in progress.
 
-#####[ShowAlert(support linux as soon as possible)](#ShowAlert)
+#####[ShowAlert](#ShowAlert)
 #####[CloseWindow](#CloseWindow)
 #####[IsValid](#IsValid)
 #####[SetActive](#SetActive)
diff --git a/robotgo.go b/robotgo.go
index 52f0f9e..d3eafb0 100644
--- a/robotgo.go
+++ b/robotgo.go
@@ -39,7 +39,7 @@ import (
 )
 
 const (
-	version string = "v0.41.1.202,fate!"
+	version string = "v0.41.1.204,fate!"
 )
 
 //GetVersion get version
diff --git a/window/alert_c.h b/window/alert_c.h
index 19cdef6..5a61033 100644
--- a/window/alert_c.h
+++ b/window/alert_c.h
@@ -123,8 +123,9 @@ static int runTask(const char *taskname, char * const argv[], int *exit_status);
 
 static int xmessage(char *argv[], int *exit_status)
 {
-	static const char * const MSG_PROGS[] = {"gmessage", "gxmessage",
-	                                         "kmessage", "xmessage"};
+	// static const char * const MSG_PROGS[] = {"gmessage", "gxmessage",
+	//                                          "kmessage", "xmessage"};
+	static const char * const MSG_PROGS[] = {"xmessage"};
 	static int PREV_MSG_INDEX = -1;
 	#define MSG_PROGS_LEN (sizeof(MSG_PROGS) / sizeof(MSG_PROGS[0]))
 
@@ -155,15 +156,18 @@ static int xmessage(char *argv[], int *exit_status)
 
 static int runTask(const char *taskname, char * const argv[], int *exit_status)
 {
-	pid_t pid;
+	pid_t pid = fork();
 	int status;
 
-	switch (pid = fork()) {
+	switch (pid) {
 		case -1: /* Failed to fork */
 			perror("fork");
 			return FORK_FAILED; /* Failed to fork. */
 		case 0: /* Child process */
-			execvp(taskname, argv);
+			if (strcmp(argv[0],"xmessage") == 0){
+				execvp(taskname, argv);
+				perror("execvp failed");
+			}
 			exit(42); /* Failed to run task. */
 		default: /* Parent process */
 			wait(&status); /* Block execution until finished. */