diff --git a/wp-admin/setup-config.php b/wp-admin/setup-config.php
index 098e5d0524..7ea9d0be02 100644
--- a/wp-admin/setup-config.php
+++ b/wp-admin/setup-config.php
@@ -349,7 +349,7 @@ switch ( $step ) {
 
 		$key = 0;
 		foreach ( $config_file as $line_num => $line ) {
-			if ( '$table_prefix =' == substr( $line, 0, 16 ) ) {
+			if ( '$table_prefix =' == substr( $line, 0, 15 ) ) {
 				$config_file[ $line_num ] = '$table_prefix = \'' . addcslashes( $prefix, "\\'" ) . "';\r\n";
 				continue;
 			}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8ed6531b45..fa6f779c48 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-RC1-44737';
+$wp_version = '5.1-RC1-44738';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.