diff --git a/lib/discourse_chat/provider/hipchat/hipchat_provider.rb b/lib/discourse_chat/provider/hipchat/hipchat_provider.rb
index e778473..a32da2a 100644
--- a/lib/discourse_chat/provider/hipchat/hipchat_provider.rb
+++ b/lib/discourse_chat/provider/hipchat/hipchat_provider.rb
@@ -41,10 +41,10 @@ module DiscourseChat
           )
 
         icon_url =
-          if !SiteSetting.chat_integration_hipchat_icon_url.blank?
+          if SiteSetting.chat_integration_hipchat_icon_url.present?
             UrlHelper.absolute(SiteSetting.chat_integration_hipchat_icon_url)
-          elsif !SiteSetting.logo_small_url.blank?
-            UrlHelper.absolute(SiteSetting.logo_small_url)
+          elsif (url = (SiteSetting.try(:site_logo_small_url) || SiteSetting.logo_small_url)).present?
+            UrlHelper.absolute(url)
           end
 
         message = {
diff --git a/lib/discourse_chat/provider/mattermost/mattermost_provider.rb b/lib/discourse_chat/provider/mattermost/mattermost_provider.rb
index 02573db..fb86db7 100644
--- a/lib/discourse_chat/provider/mattermost/mattermost_provider.rb
+++ b/lib/discourse_chat/provider/mattermost/mattermost_provider.rb
@@ -44,10 +44,10 @@ module DiscourseChat
         end
 
         icon_url =
-          if !SiteSetting.chat_integration_mattermost_icon_url.blank?
+          if SiteSetting.chat_integration_mattermost_icon_url.present?
             UrlHelper.absolute(SiteSetting.chat_integration_mattermost_icon_url)
-          elsif !SiteSetting.logo_small_url.blank?
-            UrlHelper.absolute(SiteSetting.logo_small_url)
+          elsif (url = (SiteSetting.try(:site_logo_small_url) || SiteSetting.logo_small_url)).present?
+            UrlHelper.absolute(url)
           end
 
         message = {
diff --git a/lib/discourse_chat/provider/slack/slack_provider.rb b/lib/discourse_chat/provider/slack/slack_provider.rb
index b771516..7cc6727 100644
--- a/lib/discourse_chat/provider/slack/slack_provider.rb
+++ b/lib/discourse_chat/provider/slack/slack_provider.rb
@@ -32,10 +32,10 @@ module DiscourseChat::Provider::SlackProvider
     end
 
     icon_url =
-      if !SiteSetting.chat_integration_slack_icon_url.blank?
+      if SiteSetting.chat_integration_slack_icon_url.present?
         "#{Discourse.base_url}#{SiteSetting.chat_integration_slack_icon_url}"
-      elsif !SiteSetting.logo_small_url.blank?
-        "#{Discourse.base_url}#{SiteSetting.logo_small_url}"
+      elsif (url = (SiteSetting.try(:site_logo_small_url) || SiteSetting.logo_small_url)).present?
+        "#{Discourse.base_url}#{url}"
       end
 
     message = {
diff --git a/spec/lib/discourse_chat/provider/mattermost/mattermost_provider_spec.rb b/spec/lib/discourse_chat/provider/mattermost/mattermost_provider_spec.rb
index aa608bd..c485ffa 100644
--- a/spec/lib/discourse_chat/provider/mattermost/mattermost_provider_spec.rb
+++ b/spec/lib/discourse_chat/provider/mattermost/mattermost_provider_spec.rb
@@ -4,10 +4,12 @@ RSpec.describe DiscourseChat::Provider::MattermostProvider do
   let(:post) { Fabricate(:post) }
 
   describe '.trigger_notifications' do
+    let(:upload) { Fabricate(:upload) }
+
     before do
       SiteSetting.chat_integration_mattermost_enabled = true
       SiteSetting.chat_integration_mattermost_webhook_url = "https://mattermost.blah/hook/abcd"
-      SiteSetting.logo_small_url = "https://some_small_logo"
+      SiteSetting.logo_small = upload
     end
 
     let(:chan1) { DiscourseChat::Channel.create!(provider: 'mattermost', data: { identifier: "#awesomechannel" }) }
@@ -21,7 +23,7 @@ RSpec.describe DiscourseChat::Provider::MattermostProvider do
     describe 'when mattermost icon is not configured' do
       it 'defaults to the right icon' do
         message = described_class.mattermost_message(post, chan1)
-        expect(message[:icon_url]).to eq(SiteSetting.logo_small_url)
+        expect(message[:icon_url]).to eq(UrlHelper.absolute(upload.url))
       end
     end