1 files changed, 3 insertions, 0 deletions

diff --git a/libbb/setup_environment.c b/libbb/setup_environment.c
index a95fbc5bf..73229ca6c 100644
--- a/libbb/setup_environment.c
+++ b/libbb/setup_environment.c
@@ -32,6 +32,9 @@
 
 void FAST_FUNC setup_environment(const char *shell, int flags, const struct passwd *pw)
 {
+        if (!shell || !shell[0])
+                shell = DEFAULT_SHELL;
+
         /* Change the current working directory to be the home directory
          * of the user */
         if (chdir(pw->pw_dir)) {