diff -uNr a/agents/gce/fence_gce.py b/agents/gce/fence_gce.py
--- a/agents/gce/fence_gce.py	2018-07-30 16:09:45.811531118 +0200
+++ b/agents/gce/fence_gce.py	2018-07-30 16:31:28.970202508 +0200
@@ -174,9 +174,9 @@
 	all_opt["stackdriver-logging"] = {
 		"getopt" : "",
 		"longopt" : "stackdriver-logging",
-		"help" : "--stackdriver-logging		Enable Logging to Stackdriver",
-		"shortdesc" : "Stackdriver-logging support.",
-		"longdesc" : "If enabled IP failover logs will be posted to stackdriver logging.",
+		"help" : "--stackdriver-logging		Enable Logging to Stackdriver. Using stackdriver logging requires additional libraries (google-cloud-logging).",
+		"shortdesc" : "Stackdriver-logging support. Requires additional libraries (google-cloud-logging).",
+		"longdesc" : "If enabled IP failover logs will be posted to stackdriver logging. Using stackdriver logging requires additional libraries (google-cloud-logging).",
 		"required" : "0",
 		"order" : 4
 	}
diff -uNr a/tests/data/metadata/fence_gce.xml b/tests/data/metadata/fence_gce.xml
--- a/tests/data/metadata/fence_gce.xml	2018-07-30 16:09:45.548532576 +0200
+++ b/tests/data/metadata/fence_gce.xml	2018-07-30 16:32:05.392988450 +0200
@@ -41,12 +41,12 @@
 	<parameter name="stackdriver-logging" unique="0" required="0" deprecated="1">
 		<getopt mixed="--stackdriver-logging" />
 		<content type="boolean"  />
-		<shortdesc lang="en">Stackdriver-logging support.</shortdesc>
+		<shortdesc lang="en">Stackdriver-logging support. Requires additional libraries (google-cloud-logging).</shortdesc>
 	</parameter>
 	<parameter name="stackdriver_logging" unique="0" required="0" obsoletes="stackdriver-logging">
 		<getopt mixed="--stackdriver-logging" />
 		<content type="boolean"  />
-		<shortdesc lang="en">Stackdriver-logging support.</shortdesc>
+		<shortdesc lang="en">Stackdriver-logging support. Requires additional libraries (google-cloud-logging).</shortdesc>
 	</parameter>
 	<parameter name="quiet" unique="0" required="0">
 		<getopt mixed="-q, --quiet" />