diff --git a/lib/common.lib.php b/lib/common.lib.php
index 742cdcac5..18562a637 100644
--- a/lib/common.lib.php
+++ b/lib/common.lib.php
@@ -2348,7 +2348,7 @@ function delete_editor_thumbnail($contents)
         $imgurl = @parse_url($matchs[1][$i]);
         // $srcfile = dirname(G5_PATH).$imgurl['path'];
         $srcfile = (G5_PATH).$imgurl['path'];
-        if(! preg_match('/(\.jpe?g|\.gif|\.png)$/i', $srcfile)) continue;
+        if(!preg_match('/(\.jpe?g|\.gif|\.png|\.webp)$/i', $srcfile)) continue;
         $filename = preg_replace("/\.[^\.]+$/i", "", basename($srcfile));
         $filepath = dirname($srcfile);
         $files = glob($filepath.'/thumb-'.$filename.'*');