diff --git a/traceroute-autotools.patch b/traceroute-autotools.patch
index 1f5398f..397b2e8 100644
--- a/traceroute-autotools.patch
+++ b/traceroute-autotools.patch
@@ -19,7 +19,7 @@ Index: traceroute-2.1.0/Makefile.am
 +					 traceroute/mod-dccp.c traceroute/mod-raw.c traceroute/module.c traceroute/random.c
 +
 +traceroute_traceroute_LDFLAGS = -pie
-+traceroute_traceroute_LDADD = libsupp.a
++traceroute_traceroute_LDADD = libsupp.a -lm
 \ No newline at end of file
 Index: traceroute-2.1.0/configure.ac
 ===================================================================
diff --git a/traceroute.changes b/traceroute.changes
index e9afb7b..984a01c 100644
--- a/traceroute.changes
+++ b/traceroute.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Jan 15 12:44:16 UTC 2019 - Cristian Rodríguez <crrodriguez@opensuse.org>
+
+- fix undefined reference to "ceil", some compiler versions do
+  not optimize-out or inline ceil, but anyways libm is required.
+
 -------------------------------------------------------------------
 Tue Jan  8 15:02:56 UTC 2019 - Cristian Rodríguez <crrodriguez@opensuse.org>