diff --git a/src/os_win32.c b/src/os_win32.c
index 4921b50..d3cab02 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -111,6 +111,7 @@
 typedef int HINSTANCE;
 typedef int HWND;
 typedef int INPUT_RECORD;
+typedef int INT;
 typedef int KEY_EVENT_RECORD;
 typedef int LOGFONT;
 typedef int LPBOOL;
@@ -657,13 +658,13 @@
     return NULL;
 }
 
-    int
+    static int
 null_libintl_putenv(const char *envstring UNUSED)
 {
     return 0;
 }
 
-    int
+    static int
 null_libintl_wputenv(const wchar_t *envstring UNUSED)
 {
     return 0;