diff --git a/src/stub/l_lx_elf.c b/src/stub/l_lx_elf.c
index ec126cd7..faab6fc5 100644
--- a/src/stub/l_lx_elf.c
+++ b/src/stub/l_lx_elf.c
@@ -94,6 +94,7 @@ do_brk(void *addr)
 }
 
 static char *
+__attribute__((cdecl))
 do_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
 {
     (void)len; (void)prot; (void)flags; (void)fd; (void)offset;
diff --git a/src/stub/l_lx_exec.c b/src/stub/l_lx_exec.c
index 513a7dff..a4a999e4 100644
--- a/src/stub/l_lx_exec.c
+++ b/src/stub/l_lx_exec.c
@@ -128,6 +128,7 @@ static uint32_t ascii5(char *p, uint32_t v, unsigned n)
 
 
 static char *
+__attribute__((cdecl))
 do_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
 {
     (void)len; (void)prot; (void)flags; (void)fd; (void)offset;
diff --git a/src/stub/l_lx_sep.c b/src/stub/l_lx_sep.c
index a438e77c..f38f82d8 100644
--- a/src/stub/l_lx_sep.c
+++ b/src/stub/l_lx_sep.c
@@ -112,6 +112,7 @@ do_brk(void *addr)
 }
 
 static char *
+__attribute__((cdecl))
 do_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
 {
     (void)len; (void)prot; (void)flags; (void)fd; (void)offset;
diff --git a/src/stub/l_lx_sh.c b/src/stub/l_lx_sh.c
index c3391632..8a294d97 100644
--- a/src/stub/l_lx_sh.c
+++ b/src/stub/l_lx_sh.c
@@ -94,6 +94,7 @@ do_brk(void *addr)
 }
 
 static char *
+__attribute__((cdecl))
 do_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
 {
     (void)len; (void)prot; (void)flags; (void)fd; (void)offset;