diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4a9b87b73be..97da81134cb 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2018-03-26  Tom Tromey  <tom@tromey.com>
+
+	* python/py-framefilter.c (py_print_single_arg): Return
+	EXT_LANG_BT_ERROR from catch.
+
 2018-03-26  Tom Tromey  <tom@tromey.com>
 
 	PR backtrace/15584:
diff --git a/gdb/python/py-framefilter.c b/gdb/python/py-framefilter.c
index 0662e689416..6186ffd2745 100644
--- a/gdb/python/py-framefilter.c
+++ b/gdb/python/py-framefilter.c
@@ -457,6 +457,7 @@ py_print_single_arg (struct ui_out *out,
   CATCH (except, RETURN_MASK_ERROR)
     {
       gdbpy_convert_exception (except);
+      retval = EXT_LANG_BT_ERROR;
     }
   END_CATCH