diff --git a/lib/mu-script.c b/lib/mu-script.c
index 37f40232..497e1b46 100644
--- a/lib/mu-script.c
+++ b/lib/mu-script.c
@@ -317,8 +317,9 @@ mu_script_guile_run (MuScriptInfo *msi, const char *muhome,
 	g_return_val_if_fail (muhome, FALSE);
 
 	if (access (mu_script_info_path (msi), R_OK) != 0) {
-	mu_util_g_set_error (err, MU_ERROR_FILE_CANNOT_READ,
-				      strerror(errno));
+		mu_util_g_set_error (err, MU_ERROR_FILE_CANNOT_READ,
+				     "failed to read script: %s",
+				     strerror(errno));
 		 return FALSE;
 	 }
 	argv[2] = (char*)mu_script_info_path (msi);
diff --git a/lib/mu-str.h b/lib/mu-str.h
index a813a344..3d2e0a86 100644
--- a/lib/mu-str.h
+++ b/lib/mu-str.h
@@ -166,7 +166,7 @@ char* mu_str_xapian_escape_in_place_try (char *query, gboolean esc_space,
  * replace ':' with '_', if it's not following a xapian-prefix (such
  * as 'subject:', 't:' etc, as defined in mu-msg-fields.[ch]).
  *
- * @param query a query string
+ * @param str a string
  * @param esc_space escape space characters as well
  * @param strchunk (optional) if non-NULL, allocate strings on strchunk
  *
@@ -174,7 +174,7 @@ char* mu_str_xapian_escape_in_place_try (char *query, gboolean esc_space,
  * Unless strchunk was provided, user must g_free the string when
  * no longer needed
  */
-char* mu_str_xapian_escape (const char *query, gboolean esc_space,
+char* mu_str_xapian_escape (const char *str, gboolean esc_space,
 			    GStringChunk *strchunk)  G_GNUC_WARN_UNUSED_RESULT;