diff --git a/Lib/pre.py b/Lib/pre.py
index 357e0a6..1665660 100644
--- a/Lib/pre.py
+++ b/Lib/pre.py
@@ -364,7 +364,7 @@
             # See if repl contains group references
             try:
                 repl = pcre_expand(_Dummy, repl)
-            except:
+            except error:
                 m = MatchObject(self, source, 0, end, [])
                 repl = lambda m, repl=repl, expand=pcre_expand: expand(m, repl)
             else: