diff --git a/plugins/include/dbi.inc b/plugins/include/dbi.inc
index 23dbe9aa..14af3e44 100644
--- a/plugins/include/dbi.inc
+++ b/plugins/include/dbi.inc
@@ -393,7 +393,7 @@ methodmap Database < Handle
 	// @param format        Formatting rules.
 	// @param ...           Variable number of format parameters.
 	// @return              Number of cells written.
-	public native int Format(const char[] buffer, int maxlength, const char[] format, any ...);
+	public native int Format(char[] buffer, int maxlength, const char[] format, any ...);
 
 	// Returns whether a database is the same connection as another database.
 	public native bool IsSameConnection(Database other);
@@ -664,7 +664,7 @@ native bool SQL_EscapeString(Handle database,
  * @param ...           Variable number of format parameters.
  * @return              Number of cells written.
  */
-native int SQL_FormatQuery(Handle database, const char[] buffer, int maxlength, const char[] format, any ...);
+native int SQL_FormatQuery(Handle database, char[] buffer, int maxlength, const char[] format, any ...);
 
 /**
  * This function is deprecated.  Use SQL_EscapeString instead.