diff --git a/client/compliance_client.go b/client/compliance_client.go
index dc17e35b6..726fc8ce7 100644
--- a/client/compliance_client.go
+++ b/client/compliance_client.go
@@ -121,7 +121,7 @@ func defaultComplianceRESTCallOptions() *ComplianceCallOptions {
 	}
 }
 
-// internalComplianceClient is an interface that defines the methods availaible from Client Libraries Showcase API.
+// internalComplianceClient is an interface that defines the methods available from Client Libraries Showcase API.
 type internalComplianceClient interface {
 	Close() error
 	setGoogleClientInfo(...string)
diff --git a/client/echo_client.go b/client/echo_client.go
index 76a444184..05aba9ea1 100644
--- a/client/echo_client.go
+++ b/client/echo_client.go
@@ -194,7 +194,7 @@ func defaultEchoRESTCallOptions() *EchoCallOptions {
 	}
 }
 
-// internalEchoClient is an interface that defines the methods availaible from Client Libraries Showcase API.
+// internalEchoClient is an interface that defines the methods available from Client Libraries Showcase API.
 type internalEchoClient interface {
 	Close() error
 	setGoogleClientInfo(...string)
diff --git a/client/identity_client.go b/client/identity_client.go
index 1068bb5df..2b215a120 100644
--- a/client/identity_client.go
+++ b/client/identity_client.go
@@ -156,7 +156,7 @@ func defaultIdentityRESTCallOptions() *IdentityCallOptions {
 	}
 }
 
-// internalIdentityClient is an interface that defines the methods availaible from Client Libraries Showcase API.
+// internalIdentityClient is an interface that defines the methods available from Client Libraries Showcase API.
 type internalIdentityClient interface {
 	Close() error
 	setGoogleClientInfo(...string)
diff --git a/client/messaging_client.go b/client/messaging_client.go
index 6100477ca..94a50e08c 100644
--- a/client/messaging_client.go
+++ b/client/messaging_client.go
@@ -269,7 +269,7 @@ func defaultMessagingRESTCallOptions() *MessagingCallOptions {
 	}
 }
 
-// internalMessagingClient is an interface that defines the methods availaible from Client Libraries Showcase API.
+// internalMessagingClient is an interface that defines the methods available from Client Libraries Showcase API.
 type internalMessagingClient interface {
 	Close() error
 	setGoogleClientInfo(...string)
diff --git a/client/sequence_client.go b/client/sequence_client.go
index 73fc37a2a..7588ffd99 100644
--- a/client/sequence_client.go
+++ b/client/sequence_client.go
@@ -129,7 +129,7 @@ func defaultSequenceRESTCallOptions() *SequenceCallOptions {
 	}
 }
 
-// internalSequenceClient is an interface that defines the methods availaible from Client Libraries Showcase API.
+// internalSequenceClient is an interface that defines the methods available from Client Libraries Showcase API.
 type internalSequenceClient interface {
 	Close() error
 	setGoogleClientInfo(...string)
diff --git a/client/testing_client.go b/client/testing_client.go
index 6b2a8f19f..f9c3ae70b 100644
--- a/client/testing_client.go
+++ b/client/testing_client.go
@@ -121,7 +121,7 @@ func defaultTestingRESTCallOptions() *TestingCallOptions {
 	}
 }
 
-// internalTestingClient is an interface that defines the methods availaible from Client Libraries Showcase API.
+// internalTestingClient is an interface that defines the methods available from Client Libraries Showcase API.
 type internalTestingClient interface {
 	Close() error
 	setGoogleClientInfo(...string)