diff --git bp-blogs/bp-blogs-template.php bp-blogs/bp-blogs-template.php
index 7efaff0..17341fb 100644
--- bp-blogs/bp-blogs-template.php
+++ bp-blogs/bp-blogs-template.php
@@ -1007,27 +1007,6 @@ function bp_blogs_signup_blog( $blogname = '', $blog_title = '', $errors = '' )
 }
 
 /**
- * Output the base URL for subdomain installations of WordPress Multisite.
- *
- * @since BuddyPress (1.6.0)
- */
-function bp_blogs_subdomain_base() {
-	echo bp_blogs_get_subdomain_base();
-}
-	/**
-	 * Return the base URL for subdomain installations of WordPress Multisite.
-	 *
-	 * @since BuddyPress (1.6.0)
-	 *
-	 * @return string The base URL - eg, 'example.com' for site_url() example.com or www.example.com.
-	 */
-	function bp_blogs_get_subdomain_base() {
-		global $current_site;
-
-		return apply_filters( 'bp_blogs_subdomain_base', preg_replace( '|^www\.|', '', $current_site->domain ) . $current_site->path );
-	}
-
-/**
  * Process a blog registration submission.
  *
  * Passes submitted values to {@link wpmu_create_blog()}.
diff --git bp-core/deprecated/2.0.php bp-core/deprecated/2.0.php
index 18608d2..a2cb2d4 100644
--- bp-core/deprecated/2.0.php
+++ bp-core/deprecated/2.0.php
@@ -30,3 +30,19 @@ function bp_blogs_catch_published_post() {
 function bp_messages_screen_inbox_mark_notifications() {
 	_deprecated_function( __FUNCTION__, '2.0', 'bp_messages_screen_conversation_mark_notifications()' );
 }
+
+/**
+ * @deprecated BuddyPress (2.0.0)
+ */
+function bp_blogs_subdomain_base() {
+	_deprecated_function( __FUNCTION__, '2.0', 'bp_signup_subdomain_base()' );
+	echo bp_signup_get_subdomain_base();
+}
+
+/**
+ * @deprecated BuddyPress (2.0.0)
+ */
+function bp_blogs_get_subdomain_base() {
+	_deprecated_function( __FUNCTION__, '2.0', 'bp_signup_get_subdomain_base()' );
+	return bp_signup_get_subdomain_base();
+}
diff --git bp-members/bp-members-template.php bp-members/bp-members-template.php
index 5741693..80d3a0f 100644
--- bp-members/bp-members-template.php
+++ bp-members/bp-members-template.php
@@ -1143,6 +1143,32 @@ function bp_signup_blog_url_value() {
 		return apply_filters( 'bp_get_signup_blog_url_value', $value );
 	}
 
+/**
+ * Output the base URL for subdomain installations of WordPress Multisite.
+ *
+ * @since BuddyPress (2.0.0)
+ */
+function bp_signup_subdomain_base() {
+	echo bp_signup_get_subdomain_base();
+}
+	/**
+	 * Return the base URL for subdomain installations of WordPress Multisite.
+	 *
+	 * Replaces bp_blogs_get_subdomain_base()
+	 *
+	 * @since BuddyPress (2.0.0)
+	 *
+	 * @return string The base URL - eg, 'example.com' for site_url() example.com or www.example.com.
+	 */
+	function bp_signup_get_subdomain_base() {
+		global $current_site;
+
+		// In case plugins are still using this filter
+		$subdomain_base = apply_filters( 'bp_blogs_subdomain_base', preg_replace( '|^www\.|', '', $current_site->domain ) . $current_site->path );
+
+		return apply_filters( 'bp_signup_subdomain_base', $subdomain_base );
+	}
+
 function bp_signup_blog_title_value() {
 	echo bp_get_signup_blog_title_value();
 }
diff --git bp-templates/bp-legacy/buddypress/members/register.php bp-templates/bp-legacy/buddypress/members/register.php
index 6624817..c237462 100644
--- bp-templates/bp-legacy/buddypress/members/register.php
+++ bp-templates/bp-legacy/buddypress/members/register.php
@@ -133,7 +133,7 @@
 						<?php do_action( 'bp_signup_blog_url_errors' ); ?>
 
 						<?php if ( is_subdomain_install() ) : ?>
-							http:// <input type="text" name="signup_blog_url" id="signup_blog_url" value="<?php bp_signup_blog_url_value(); ?>" /> .<?php bp_blogs_subdomain_base(); ?>
+							http:// <input type="text" name="signup_blog_url" id="signup_blog_url" value="<?php bp_signup_blog_url_value(); ?>" /> .<?php bp_signup_subdomain_base(); ?>
 						<?php else : ?>
 							<?php echo home_url( '/' ); ?> <input type="text" name="signup_blog_url" id="signup_blog_url" value="<?php bp_signup_blog_url_value(); ?>" />
 						<?php endif; ?>
diff --git bp-themes/bp-default/registration/register.php bp-themes/bp-default/registration/register.php
index 399b358..e15534a 100644
--- bp-themes/bp-default/registration/register.php
+++ bp-themes/bp-default/registration/register.php
@@ -217,7 +217,7 @@
 							<?php do_action( 'bp_signup_blog_url_errors' ); ?>
 
 							<?php if ( is_subdomain_install() ) : ?>
-								http:// <input type="text" name="signup_blog_url" id="signup_blog_url" value="<?php bp_signup_blog_url_value(); ?>" /> .<?php bp_blogs_subdomain_base(); ?>
+								http:// <input type="text" name="signup_blog_url" id="signup_blog_url" value="<?php bp_signup_blog_url_value(); ?>" /> .<?php bp_signup_subdomain_base(); ?>
 							<?php else : ?>
 								<?php echo home_url( '/' ); ?> <input type="text" name="signup_blog_url" id="signup_blog_url" value="<?php bp_signup_blog_url_value(); ?>" />
 							<?php endif; ?>