diff --git a/execute.c b/execute.c
index f0c4f87..37269fb 100755
--- a/execute.c
+++ b/execute.c
@@ -143,15 +143,7 @@ static void run_child(int fd_send_filename, const char* tmpdir) {
     int outfd;
     int err;
     struct timeval starttv;
-    char *cmd;
-    int cmdLen = 0;
-
-    for (int i = 0; i < command_line.command.num; cmdLen += strlen(command_line.command.array[i++]) + 1);
-    cmd = malloc(cmdLen * sizeof(char) + 1);
-    for (int i = 0; i < command_line.command.num; i++) {
-        strcat(cmd, command_line.command.array[i]);
-        strcat(cmd, " ");
-    }
+    char *cmd = build_command_string();
 
     if (command_line.logfile) {
         outfname = malloc(1 + strlen(command_line.logfile) + strlen(".XXXXXX") + 1);