Fixed compilation with -Wmissing-prototypes.
diff --git a/src/core/ngx_module.c b/src/core/ngx_module.c
index 2d81b38..3e3c506 100644
--- a/src/core/ngx_module.c
+++ b/src/core/ngx_module.c
@@ -23,7 +23,7 @@
 
 
 ngx_int_t
-ngx_preinit_modules()
+ngx_preinit_modules(void)
 {
     ngx_uint_t  i;
 
diff --git a/src/core/ngx_module.h b/src/core/ngx_module.h
index 3e74def..e911cb4 100644
--- a/src/core/ngx_module.h
+++ b/src/core/ngx_module.h
@@ -288,7 +288,7 @@
 } ngx_core_module_t;
 
 
-ngx_int_t ngx_preinit_modules();
+ngx_int_t ngx_preinit_modules(void);
 ngx_int_t ngx_cycle_modules(ngx_cycle_t *cycle);
 ngx_int_t ngx_init_modules(ngx_cycle_t *cycle);
 ngx_int_t ngx_count_modules(ngx_cycle_t *cycle, ngx_uint_t type);