diff --git a/lib/composer.json b/lib/composer.json
index cd8bd10fd4..015dbfa579 100644
--- a/lib/composer.json
+++ b/lib/composer.json
@@ -54,7 +54,8 @@
                 "Add namespace to Spyc class": "patches/spyc-add-namespace.patch"
             },
             "pclzip/pclzip": {
-                "Add namespace to PclZip class": "patches/pclzip-add-namespace.patch"
+                "Add namespace to PclZip class": "patches/pclzip-add-namespace.patch",
+                "Fix memory limit calculation in privOptionDefaultThreshold method": "patches/pclzip-memory-limit-fix.patch"
             },
             "phpoffice/phpspreadsheet": {
                 "Add timezone helper methods to Date class": "patches/phpspreadsheet-add-timezone-helpers.patch",
diff --git a/lib/patches/pclzip-memory-limit-fix.patch b/lib/patches/pclzip-memory-limit-fix.patch
new file mode 100644
index 0000000000..24ce2cdbfa
--- /dev/null
+++ b/lib/patches/pclzip-memory-limit-fix.patch
@@ -0,0 +1,12 @@
+diff --git a/vendor/pclzip/pclzip/pclzip.lib.php b/vendor/pclzip/pclzip/pclzip.lib.php
+index 11b7e552199..37f19d23b9d 100644
+--- a/vendor/pclzip/pclzip/pclzip.lib.php
++++ b/vendor/pclzip/pclzip/pclzip.lib.php
+@@ -1789,6 +1789,7 @@ class PclZip
+         $v_memory_limit = ini_get('memory_limit');
+         $v_memory_limit = trim($v_memory_limit);
+         $last           = strtolower(substr($v_memory_limit, -1));
++        $v_memory_limit = (float)$v_memory_limit;
+
+         if ($last == 'g') {
+             //$v_memory_limit = $v_memory_limit*1024*1024*1024;