diff --git a/dll/win32/crtdll/dllmain.c b/dll/win32/crtdll/dllmain.c
index 41e481da858..8d6af8c69b2 100644
--- a/dll/win32/crtdll/dllmain.c
+++ b/dll/win32/crtdll/dllmain.c
@@ -32,7 +32,6 @@ extern void __getmainargs( int *argc, char ***argv, char ***envp,
 extern int BlockEnvToEnvironA(void);
 extern int BlockEnvToEnvironW(void);
 extern void FreeEnvironment(char **environment);
-extern void _atexit_cleanup(void);
 
 extern unsigned int _osver;
 extern unsigned int _winminor;
diff --git a/sdk/lib/crt/stdlib/atexit.c b/sdk/lib/crt/stdlib/atexit.c
index 6ab8942b333..49247baddc7 100644
--- a/sdk/lib/crt/stdlib/atexit.c
+++ b/sdk/lib/crt/stdlib/atexit.c
@@ -69,7 +69,7 @@ _onexit_t CDECL _onexit(_onexit_t func)
   {
     _onexit_t *newtable;
     TRACE("expanding table\n");
-    newtable = calloc(atexit_table_size + 32, sizeof(void *));
+    newtable = calloc(atexit_table_size + 32, sizeof(_onexit_t));
     if (!newtable)
     {
       TRACE("failed!\n");