diff --git a/v5/core/authenticator_factory.go b/v5/core/authenticator_factory.go
index b434906c..5b7e9b03 100644
--- a/v5/core/authenticator_factory.go
+++ b/v5/core/authenticator_factory.go
@@ -29,6 +29,13 @@ func GetAuthenticatorFromEnvironment(credentialKey string) (authenticator Authen
 
 	// Determine the authentication type if not specified explicitly.
 	authType := properties[PROPNAME_AUTH_TYPE]
+
+	// Support alternate "AUTHTYPE" property.
+	if authType == "" {
+		authType = properties["AUTHTYPE"]
+	}
+
+	// Determine a default auth type if one wasn't specified.
 	if authType == "" {
 		// If the APIKEY property is specified, then we'll guess IAM... otherwise CR Auth.
 		if properties[PROPNAME_APIKEY] != "" {
diff --git a/v5/core/config_utils_test.go b/v5/core/config_utils_test.go
index 448a202e..9cac708c 100644
--- a/v5/core/config_utils_test.go
+++ b/v5/core/config_utils_test.go
@@ -75,7 +75,7 @@ func TestGetServicePropertiesFromCredentialFile(t *testing.T) {
 	assert.Equal(t, "https://service2/api", props[PROPNAME_SVC_URL])
 	assert.Equal(t, "false", props[PROPNAME_SVC_DISABLE_SSL])
 	assert.Equal(t, "false", props[PROPNAME_SVC_ENABLE_GZIP])
-	assert.Equal(t, strings.ToUpper(AUTHTYPE_BASIC), strings.ToUpper(props[PROPNAME_AUTH_TYPE]))
+	assert.Equal(t, strings.ToUpper(AUTHTYPE_BASIC), strings.ToUpper(props["AUTHTYPE"]))
 	assert.Equal(t, "my-user", props[PROPNAME_USERNAME])
 	assert.Equal(t, "my-password", props[PROPNAME_PASSWORD])
 
@@ -85,7 +85,7 @@ func TestGetServicePropertiesFromCredentialFile(t *testing.T) {
 	assert.Equal(t, "https://service3/api", props[PROPNAME_SVC_URL])
 	assert.Equal(t, "false", props[PROPNAME_SVC_DISABLE_SSL])
 	assert.Equal(t, "notabool", props[PROPNAME_SVC_ENABLE_GZIP])
-	assert.Equal(t, strings.ToUpper(AUTHTYPE_CP4D), strings.ToUpper(props[PROPNAME_AUTH_TYPE]))
+	assert.Equal(t, strings.ToUpper(AUTHTYPE_CP4D), strings.ToUpper(props["AUTHTYPE"]))
 	assert.Equal(t, "my-cp4d-user", props[PROPNAME_USERNAME])
 	assert.Equal(t, "my-cp4d-password", props[PROPNAME_PASSWORD])
 	assert.Equal(t, "https://cp4dhost/cp4d/api", props[PROPNAME_AUTH_URL])
diff --git a/v5/resources/my-credentials.env b/v5/resources/my-credentials.env
index 94c0c0b5..f9b73571 100644
--- a/v5/resources/my-credentials.env
+++ b/v5/resources/my-credentials.env
@@ -31,12 +31,12 @@ SERVICE_1_AUTH_URL=https://iamhost/iam/api
 SERVICE_1_AUTH_DISABLE_SSL=true
 
 # Service2 configured with Basic Auth
-SERVICE2_AUTH_TYPE=BasiC
+SERVICE2_AUTHTYPE=BasiC
 SERVICE2_USERNAME=my-user
 SERVICE2_PASSWORD=my-password
 
 # Service3 configured with CP4D
-SERVICE3_AUTH_TYPE=CP4d
+SERVICE3_AUTHTYPE=CP4d
 SERVICE3_AUTH_URL=https://cp4dhost/cp4d/api
 SERVICE3_USERNAME=my-cp4d-user
 SERVICE3_PASSWORD=my-cp4d-password