diff --git a/apps/app_dictate.c b/apps/app_dictate.c
index abd0ec11de3e8c10c148f12d864fe03bdcb63956..58d61116a6988cf7f51ffb422c990fd25a3dba61 100644
--- a/apps/app_dictate.c
+++ b/apps/app_dictate.c
@@ -170,7 +170,7 @@ static int dictate_exec(struct ast_channel *chan, void *data)
 						if (speed > 4) {
 							speed = 1;
 						}
-						res = ast_say_number(chan, speed, AST_DIGIT_ANY, chan->language, (char *) NULL);
+						res = ast_say_number(chan, speed, AST_DIGIT_ANY, chan->language, NULL);
 						break;
 					case '7':
 						samples -= ffactor;
diff --git a/apps/app_mp3.c b/apps/app_mp3.c
index d2f2f5c0e2d903f5f1514940935b6ed655094a0e..9a4895214d8f157cd9098e6040dd7b3e7ea8cd81 100644
--- a/apps/app_mp3.c
+++ b/apps/app_mp3.c
@@ -82,19 +82,19 @@ static int mp3play(char *filename, int fd)
 	/* Execute mpg123, but buffer if it's a net connection */
 	if (!strncasecmp(filename, "http://", 7)) {
 		/* Most commonly installed in /usr/local/bin */
-	    execl(LOCAL_MPG_123, "mpg123", "-q", "-s", "-b", "1024", "-f", "8192", "--mono", "-r", "8000", filename, (char *)NULL);
+	    execl(LOCAL_MPG_123, "mpg123", "-q", "-s", "-b", "1024", "-f", "8192", "--mono", "-r", "8000", filename, NULL);
 		/* But many places has it in /usr/bin */
-	    execl(MPG_123, "mpg123", "-q", "-s", "-b", "1024","-f", "8192", "--mono", "-r", "8000", filename, (char *)NULL);
+	    execl(MPG_123, "mpg123", "-q", "-s", "-b", "1024","-f", "8192", "--mono", "-r", "8000", filename, NULL);
 		/* As a last-ditch effort, try to use PATH */
-	    execlp("mpg123", "mpg123", "-q", "-s", "-b", "1024",  "-f", "8192", "--mono", "-r", "8000", filename, (char *)NULL);
+	    execlp("mpg123", "mpg123", "-q", "-s", "-b", "1024",  "-f", "8192", "--mono", "-r", "8000", filename, NULL);
 	}
 	else {
 		/* Most commonly installed in /usr/local/bin */
-	    execl(MPG_123, "mpg123", "-q", "-s", "-f", "8192", "--mono", "-r", "8000", filename, (char *)NULL);
+	    execl(MPG_123, "mpg123", "-q", "-s", "-f", "8192", "--mono", "-r", "8000", filename, NULL);
 		/* But many places has it in /usr/bin */
-	    execl(LOCAL_MPG_123, "mpg123", "-q", "-s", "-f", "8192", "--mono", "-r", "8000", filename, (char *)NULL);
+	    execl(LOCAL_MPG_123, "mpg123", "-q", "-s", "-f", "8192", "--mono", "-r", "8000", filename, NULL);
 		/* As a last-ditch effort, try to use PATH */
-	    execlp("mpg123", "mpg123", "-q", "-s", "-f", "8192", "--mono", "-r", "8000", filename, (char *)NULL);
+	    execlp("mpg123", "mpg123", "-q", "-s", "-f", "8192", "--mono", "-r", "8000", filename, NULL);
 	}
 	ast_log(LOG_WARNING, "Execute of mpg123 failed\n");
 	_exit(0);
diff --git a/apps/app_voicemail.c b/apps/app_voicemail.c
index 22254f062e7abe9b920dd4124a4e259af565757b..b3c687a299c74bd4d3f7b1a29d415ea6d1e33707 100644
--- a/apps/app_voicemail.c
+++ b/apps/app_voicemail.c
@@ -3954,7 +3954,7 @@ static int get_folder(struct ast_channel *chan, int start)
 	if (d)
 		return d;
 	for (x = start; x< 5; x++) {	/* For all folders */
-		if ((d = ast_say_number(chan, x, AST_DIGIT_ANY, chan->language, (char *) NULL)))
+		if ((d = ast_say_number(chan, x, AST_DIGIT_ANY, chan->language, NULL)))
 			return d;
 		d = ast_play_and_wait(chan, "vm-for");	/* "for" */
 		if (d)
@@ -4699,7 +4699,7 @@ static int play_message(struct ast_channel *chan, struct ast_vm_user *vmu, struc
 		res = wait_file2(chan, vms, "vm-message");	/* "message" */
 		if (vms->curmsg && (vms->curmsg != vms->lastmsg)) {
 			if (!res)
-				res = ast_say_number(chan, vms->curmsg + 1, AST_DIGIT_ANY, chan->language, (char *) NULL);
+				res = ast_say_number(chan, vms->curmsg + 1, AST_DIGIT_ANY, chan->language, NULL);
 		}
 	}