diff --git a/engine/signals.c b/engine/signals.c
index b522f19..7f89bcd 100644
--- a/engine/signals.c
+++ b/engine/signals.c
@@ -399,7 +399,7 @@ void install_signal_handlers(void)
 #endif
   };
   int i;
-  void (*throw_handler)() = die_on_signal ? graceful_exit : signal_throw;
+  void (*throw_handler)(int) = die_on_signal ? graceful_exit : signal_throw;
 #ifdef SIGSTKSZ 
   stack_t sigstack;
   int sas_retval=-1;
diff --git a/engine/support.c b/engine/support.c
index 021fa22..069c32f 100644
--- a/engine/support.c
+++ b/engine/support.c
@@ -79,7 +79,7 @@ char *tilde_cstr(Char *from, UCell size, int clear)
 {
   char *s1,*s2;
   int s1_len, s2_len;
-  struct passwd *getpwnam (), *user_entry;
+  struct passwd *getpwnam (const char *), *user_entry;
 
   if (size<1 || from[0]!='~')
     return cstr(from, size, clear);