diff --git a/Makefile.am b/Makefile.am
index 6d2b2a1c..d9f3657e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -12,4 +12,4 @@ MAINTAINERCLEANFILES = \
 
 DEPCLEANFILES = config.log configure
 
-AUTOMAKE_OPTIONS = foreign
+AUTOMAKE_OPTIONS = foreign 1.5