diff --git a/src/wp-admin/includes/class-pclzip.php b/src/wp-admin/includes/class-pclzip.php
index ae0af7a8f101c..93446efc5a4a8 100644
--- a/src/wp-admin/includes/class-pclzip.php
+++ b/src/wp-admin/includes/class-pclzip.php
@@ -4205,11 +4205,16 @@ function privExtractFileAsString(&$p_entry, &$p_string, &$p_options)
       // ----- Do the extraction (if not a folder)
       if (!(($p_entry['external']&0x00000010)==0x00000010)) {
         // ----- Look for not compressed file
-  //      if ($p_entry['compressed_size'] == $p_entry['size'])
         if ($p_entry['compression'] == 0) {
-
-          // ----- Reading the file
-          $p_string = @fread($this->zip_fd, $p_entry['compressed_size']);
+	     if ($p_entry['compressed_size'] == 0){
+		 // ----- Fread requires a non zero length parameter
+                 // ----- Reading the file
+                 $p_string = @fread($this->zip_fd, filesize($this->zipname));
+	     }
+             else {
+                 // ----- Reading the file
+                 $p_string = @fread($this->zip_fd, $p_entry['compressed_size']);
+             }
         }
         else {