1 files changed, 2 insertions, 3 deletions

diff --git a/libbb/run_shell.c b/libbb/run_shell.c
index 30050fecb..b26eba115 100644
--- a/libbb/run_shell.c
+++ b/libbb/run_shell.c
@@ -60,9 +60,8 @@ void run_shell ( const char *shell, int loginshell, const char *command, const c
         args [0] = get_last_path_component ( xstrdup ( shell ));
         
         if ( loginshell ) {
-                char *args0 = xmalloc ( xstrlen ( args [0] ) + 2 );
-                args0 [0] = '-';
-                strcpy ( args0 + 1, args [0] );
+                char *args0;
+                bb_asprintf ( &args0, "-%s", args [0] );
                 args [0] = args0;
         }