diff --git a/vapi/libmarkdown.vapi b/vapi/libmarkdown.vapi
index 81b51890..b6219e50 100644
--- a/vapi/libmarkdown.vapi
+++ b/vapi/libmarkdown.vapi
@@ -41,7 +41,7 @@ namespace Markdown
 	public void initialize ();
 	public void with_html5_tags ();
 	public void shlib_destructor ();
-	public char markdown_version[];
+	public char markdown_version[512];
 
 	[Compact]
 	[CCode (cname = "MMIOT", cprefix = "mkd_", free_function = "mkd_cleanup")]
@@ -125,4 +125,4 @@ namespace Markdown
 		NOSTYLE,
 		EMBED
 	}
-}
\ No newline at end of file
+}