diff -ur a/st.c b/st.c
--- a/st.c	2012-02-09 14:11:29.000000000 +0000
+++ b/st.c	2012-02-09 14:13:25.000000000 +0000
@@ -661,7 +661,7 @@
 void
 execsh(void) {
 	char **args;
-	char *envshell = getenv("SHELL");
+	char *envshell = SHELL;
 
 	DEFAULT(envshell, "sh");
 	putenv("TERM="TNAME);