Index: b/src/gpafileverifyop.c
===================================================================
--- b/src/gpafileverifyop.c
+++ b/src/gpafileverifyop.c
@@ -196,14 +196,15 @@
 is_detached_sig (const gchar *filename, gchar **signature_file,
 		 gchar **signed_file, GtkWidget *window)
 {
-  const gchar *sig_extension[] = {".sig", ".sign"};
+  const gchar *sig_extension[] = {".asc", ".sig", ".sign"};
   int i;
   gchar *extension;
   /* First, check whether this file is a dettached signature */
   *signed_file = g_strdup (filename);
   extension = g_strrstr (*signed_file, ".");
   if (extension &&
-      (g_str_equal (extension, ".sig") ||
+      (g_str_equal (extension, ".asc") ||
+       g_str_equal (extension, ".sig") ||
        g_str_equal (extension, ".sign")))
     {
       *extension++ = '\0';