diff --git a/src/dbusbind.c b/src/dbusbind.c
index f7422ca2ddc..fd9a43aaf86 100644
--- a/src/dbusbind.c
+++ b/src/dbusbind.c
@@ -259,7 +259,7 @@ xd_symbol_to_dbus_type (Lisp_Object object)
     }									\
   while (0)
 
-/* Append to SIGNATURE the a copy of X, making sure SIGNATURE does
+/* Append to SIGNATURE a copy of X, making sure SIGNATURE does
    not become too long.  */
 static void
 signature_cat (char *signature, char const *x)