diff --git a/wp-admin/load-scripts.php b/wp-admin/load-scripts.php
index a409ad017e..f2794899fa 100644
--- a/wp-admin/load-scripts.php
+++ b/wp-admin/load-scripts.php
@@ -89,7 +89,7 @@ function get_file($path) {
 while ( @ob_end_clean() );
 
 if ( isset($_GET['test']) && 1 == $_GET['test'] ) {
-	if ( ini_get('zlib.output_compression') )
+	if ( ini_get('zlib.output_compression') || 'ob_gzhandler' == ini_get('output_handler') )
 		exit('');
 
 	$out = 'var wpCompressionTest = 1;';
@@ -143,7 +143,7 @@ header('Content-Type: application/x-javascript; charset=UTF-8');
 header('Expires: ' . gmdate( "D, d M Y H:i:s", time() + $expires_offset ) . ' GMT');
 header("Cache-Control: public, max-age=$expires_offset");
 	
-if ( $compress && ! ini_get('zlib.output_compression') ) {
+if ( $compress && ! ini_get('zlib.output_compression') && 'ob_gzhandler' != ini_get('output_handler') ) {
 	header('Vary: Accept-Encoding'); // Handle proxies
 	if ( false !== strpos( strtolower($_SERVER['HTTP_ACCEPT_ENCODING']), 'deflate') && function_exists('gzdeflate') && ! $force_gzip ) {
 		header('Content-Encoding: deflate');
diff --git a/wp-admin/load-styles.php b/wp-admin/load-styles.php
index 773ec945c4..8cfd915154 100644
--- a/wp-admin/load-styles.php
+++ b/wp-admin/load-styles.php
@@ -127,7 +127,7 @@ header('Content-Type: text/css');
 header('Expires: ' . gmdate( "D, d M Y H:i:s", time() + $expires_offset ) . ' GMT');
 header("Cache-Control: public, max-age=$expires_offset");
 	
-if ( $compress && ! ini_get('zlib.output_compression') ) {
+if ( $compress && ! ini_get('zlib.output_compression') && 'ob_gzhandler' != ini_get('output_handler') ) {
 	header('Vary: Accept-Encoding'); // Handle proxies
 	if ( false !== strpos( strtolower($_SERVER['HTTP_ACCEPT_ENCODING']), 'deflate') && function_exists('gzdeflate') && ! $force_gzip ) {
 		header('Content-Encoding: deflate');