diff -uNr dropbear-2018.76/common-session.c dropbear-2018.76.mod/common-session.c
--- dropbear-2018.76/common-session.c	2018-02-27 16:25:10.000000000 +0200
+++ dropbear-2018.76.mod/common-session.c	2018-04-21 13:49:06.633742995 +0300
@@ -570,7 +570,7 @@
 const char* get_user_shell() {
 	/* an empty shell should be interpreted as "/bin/sh" */
 	if (ses.authstate.pw_shell[0] == '\0') {
-		return "/bin/sh";
+		return "@TERMUX_PREFIX@/bin/sh";
 	} else {
 		return ses.authstate.pw_shell;
 	}