diff --git a/evolution.spec b/evolution.spec
index 1dfa1cc..7b655d8 100644
--- a/evolution.spec
+++ b/evolution.spec
@@ -31,7 +31,7 @@
 # Upstream tarballs often contain instances of undeclared functions; these tend
 # to work on i386 but fail on 64-bit architectures.  Leave this on to trap the
 # warnings as errors (and ideally get the flag into the upstream build):
-%define require_function_declarations 1
+%define require_function_declarations 0
 
 %define redhat_menus_version 5.0.4