1 files changed, 6 insertions, 1 deletions
diff --git a/ruby.c b/ruby.c
index ce0a96abd8..0c64d4e1ce 100644
--- a/ruby.c
+++ b/ruby.c
@@ -566,7 +566,12 @@ static VALUE
 runtime_libruby_path(void)
 {
 #if defined _WIN32 || defined __CYGWIN__
-    DWORD len = RSTRING_EMBED_LEN_MAX, ret;
+    DWORD len, ret;
+#if USE_RVARGC
+    len = 32;
+#else
+    len = RSTRING_EMBED_LEN_MAX;
+#endif
     VALUE path;
     VALUE wsopath = rb_str_new(0, len*sizeof(WCHAR));
     WCHAR *wlibpath;