--- src/w32-util.c
+++ src/w32-util.c
@@ -173,7 +173,7 @@
    NULL; caller may use GetLastError to get the actual error number.
    Calling this function with STRING set to NULL is not defined. */
 static wchar_t *
-utf8_to_wchar (const char *string)
+utf8_to_wchar_ (const char *string)
 {
   int n;
   wchar_t *result;
@@ -206,7 +206,7 @@
   if (!string)
     return NULL;
 
-  return utf8_to_wchar (string);
+  return utf8_to_wchar_ (string);
 }