diff --git a/Changelog.tmp b/Changelog.tmp
index d0851216c..22dabc035 100644
--- a/Changelog.tmp
+++ b/Changelog.tmp
@@ -1,2 +1,3 @@
 - [FilterS] Removed rals_conns in favor of reading the account directly from DataDB
-- [SessionS] Added check for missing CGRevent
\ No newline at end of file
+- [SessionS] Added check for missing CGRevent
+- [DiameterAgent] Using String function from diam.Message instead of ToJSON for request String method
diff --git a/agents/libdiam.go b/agents/libdiam.go
index 7c9157d59..582b7ef67 100644
--- a/agents/libdiam.go
+++ b/agents/libdiam.go
@@ -304,7 +304,7 @@ type diameterDP struct {
 // String is part of engine.DataProvider interface
 // when called, it will display the already parsed values out of cache
 func (dP *diameterDP) String() string {
-	return utils.ToJSON(dP.m)
+	return dP.m.String()
 }
 
 // AsNavigableMap is part of engine.DataProvider interface