diff --git a/doc/sdk/plugin-management/guide-to-the-logging-api.en.rst b/doc/sdk/plugin-management/guide-to-the-logging-api.en.rst
index e38c4d5d404..8c24eb054de 100644
--- a/doc/sdk/plugin-management/guide-to-the-logging-api.en.rst
+++ b/doc/sdk/plugin-management/guide-to-the-logging-api.en.rst
@@ -67,7 +67,8 @@ The steps below show how the logging API is used in the
 
    .. code-block:: c
 
-           log = TSTextLogObjectCreate("blacklist", TS_LOG_MODE_ADD_TIMESTAMP, NULL, &error);
+           TSReturnCode error = TSTextLogObjectCreate("blacklist",
+                                TS_LOG_MODE_ADD_TIMESTAMP, &log);
 
    The new log is named ``blacklist.log``. Each entry written to the log
    will have a timestamp. The ``NULL`` argument specifies that the new
@@ -80,7 +81,7 @@ The steps below show how the logging API is used in the
 
    .. code-block:: c
 
-       if (!log) {
+       if (error != TS_SUCCESS) {
            printf("Blacklist plugin: error %d while creating log\n", error);
        }
 
diff --git a/doc/sdk/sample-source-code.en.rst b/doc/sdk/sample-source-code.en.rst
index bd84584a44d..454795fd276 100644
--- a/doc/sdk/sample-source-code.en.rst
+++ b/doc/sdk/sample-source-code.en.rst
@@ -267,7 +267,6 @@ This plugin illustrates:
            int i;
            TSCont contp;
            TSPluginRegistrationInfo info;
-           int error;
 
            info.plugin_name = "blacklist-1";
            info.vendor_name = "DsCompany";
@@ -283,9 +282,9 @@ This plugin illustrates:
            }
 
            /* create an TSTextLogObject to log blacklisted requests to */
-           log = TSTextLogObjectCreate("blacklist", TS_LOG_MODE_ADD_TIMESTAMP,
-                    NULL, &error);
-           if (!log) {
+           TSReturnCode error = TSTextLogObjectCreate("blacklist", TS_LOG_MODE_ADD_TIMESTAMP,
+                    &log);
+           if (error != TS_SUCCESS) {
                printf("Blacklist plugin: error %d while creating log\n", error);
            }