diff --git a/crt/crt1.c b/crt/crt1.c
index af02af94..4f8ff05d 100644
--- a/crt/crt1.c
+++ b/crt/crt1.c
@@ -4,15 +4,15 @@
 
 #include "crt_arch.h"
 
-int main();
-void _init() __attribute__((weak));
-void _fini() __attribute__((weak));
+int main(int argc, char *argv[]);
+void _init(void) __attribute__((weak));
+void _fini(void) __attribute__((weak));
 _Noreturn int __libc_start_main(int (*)(), int, char **,
-	void (*)(), void(*)(), void(*)());
+	void (*)(), void(*)());
 
 void _start_c(long *p)
 {
 	int argc = p[0];
 	char **argv = (void *)(p+1);
-	__libc_start_main(main, argc, argv, _init, _fini, 0);
+	__libc_start_main(main, argc, argv, _init, _fini);
 }
diff --git a/crt/rcrt1.c b/crt/rcrt1.c
index be017153..569f0ecc 100644
--- a/crt/rcrt1.c
+++ b/crt/rcrt1.c
@@ -3,13 +3,13 @@
 #include "../ldso/dlstart.c"
 
 int main();
-void _init() __attribute__((weak));
-void _fini() __attribute__((weak));
+void _init(void) __attribute__((weak));
+void _fini(void) __attribute__((weak));
 _Noreturn int __libc_start_main(int (*)(), int, char **,
-	void (*)(), void(*)(), void(*)());
+	void (*)(), void(*)());
 
 __attribute__((__visibility__("hidden")))
 _Noreturn void __dls2(unsigned char *base, size_t *sp)
 {
-	__libc_start_main(main, *sp, (void *)(sp+1), _init, _fini, 0);
+	__libc_start_main(main, *sp, (void *)(sp+1), _init, _fini);
 }
diff --git a/src/env/__libc_start_main.c b/src/env/__libc_start_main.c
index 5e18ce73..61c57825 100644
--- a/src/env/__libc_start_main.c
+++ b/src/env/__libc_start_main.c
@@ -67,7 +67,8 @@ static void libc_start_init(void)
 
 weak_alias(libc_start_init, __libc_start_init);
 
-int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv)
+int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv,
+	void(*init)(), void(*fini)())
 {
 	char **envp = argv+argc+1;