diff --git a/m4/Makefile.am b/m4/Makefile.am
index a636b4e8..b03da1f3 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -15,7 +15,6 @@ gettext.m4 \
 glibc21.m4 \
 iconv.m4 \
 inttypes.m4 \
-isc-posix.m4 \
 jm-mktime.m4 \
 lcmessage.m4 \
 longlong.m4 \