diff --git a/src/stub/l_lx_elf.c b/src/stub/l_lx_elf.c
index 1b3abf79..35ca2884 100644
--- a/src/stub/l_lx_elf.c
+++ b/src/stub/l_lx_elf.c
@@ -204,6 +204,7 @@ make_hatch(Elf32_Phdr const *const phdr)
 }
 
 static void
+__attribute__ ((regparm(2), stdcall))
 bzero(char *p, size_t len)
 {
     if (len) do {
@@ -213,6 +214,7 @@ bzero(char *p, size_t len)
 
 
 static void
+__attribute__ ((regparm(3), stdcall))
 auxv_up(Elf32_auxv_t *av, int const type, unsigned const value)
 {
     for (;; ++av) {