diff --git a/usage.c b/usage.c
index 0555ce6..c488f3af 100644
--- a/usage.c
+++ b/usage.c
@@ -36,12 +36,12 @@
 
 /* If we are in a dlopen()ed .so write to a global variable would segfault
  * (ugh), so keep things static. */
-static NORETURN void (*usage_routine)(const char *err) = usage_builtin;
-static NORETURN void (*die_routine)(const char *err, va_list params) = die_builtin;
+static NORETURN_PTR void (*usage_routine)(const char *err) = usage_builtin;
+static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
 static void (*error_routine)(const char *err, va_list params) = error_builtin;
 static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
 
-void set_die_routine(NORETURN void (*routine)(const char *err, va_list params))
+void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
 {
 	die_routine = routine;
 }