diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5166d1..532c06a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@ i.e. `<Major version>.<Minor version>.<Patch version>`
 - Support ignore ealry media to preanswer class #91
 - Upgrate lib starlette==0.14.2 -> 0.25.0, redis==3.5.2 -> 4.4.4
 - Version fastapi starlette agreement 
+- Fix missing function early-media
 
 
 ## [v0.5.9] - 2022-07-26
diff --git a/callng/callfunc.lua b/callng/callfunc.lua
index 40cd3db..77bc638 100644
--- a/callng/callfunc.lua
+++ b/callng/callfunc.lua
@@ -220,7 +220,7 @@ function earlyMediaProcess(name, DxLeg)
         elseif streamtype == 'speak' then
             DxLeg:execute('speak', 'flite|slt|'..streamdata)
         elseif streamtype == 'signal' then
-            if ({'true', 'false', 'ring_ready'}, streamdata) then
+            if ismeberof({'true', 'false', 'ring_ready'}, streamdata) then
                 DxLeg:setVariable("ignore_early_media", streamdata)
             end
         else end