diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 7a76f1cbf..7cfd033e8 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -5,7 +5,9 @@ Version explained:
 
 Version 4.2.17
  * Feature: add flags ECE, CW and NS to TCP, (not sure if any flowspec implementation uses them) #1053
-   reported by: enag11 
+   reported by: enag11
+ * Fix: bug with IGP Metric #1056
+   patch by: hkml2000
 
 Version 4.2.16
  * Fix: bacckport of fix for #1051 tcp-flag operators != and &!= return syntax error
diff --git a/lib/exabgp/bgp/message/update/attribute/bgpls/link/igpmetric.py b/lib/exabgp/bgp/message/update/attribute/bgpls/link/igpmetric.py
index e6320f7f2..f11668f9d 100644
--- a/lib/exabgp/bgp/message/update/attribute/bgpls/link/igpmetric.py
+++ b/lib/exabgp/bgp/message/update/attribute/bgpls/link/igpmetric.py
@@ -59,4 +59,4 @@ def unpack(cls, data, length):
             raise Notify(3, 5, "Incorrect IGP Metric Size")
 
     def json(self, compact=None):
-        return '"igp-metric": %d' % int(self.igpmetric[0])
+        return '"igp-metric": %d' % int(self.igpmetric)