diff --git a/Makefile b/Makefile
index a14f083..4c2369e 100644
--- a/Makefile
+++ b/Makefile
@@ -44,7 +44,8 @@ acconfig.h: MCONFIG
 	: Generated by side effect
 
 acconfig.h.in: configure.in aclocal.m4
-	autoheader
+	autoheader -f
+	touch -c acconfig.h.in
 	rm -f acconfig.h
 
 configure: configure.in aclocal.m4