diff --git a/CRM/Import/DataSource/CSV.php b/CRM/Import/DataSource/CSV.php
index 37d5ae1ab958..c11b0aeb6a6a 100644
--- a/CRM/Import/DataSource/CSV.php
+++ b/CRM/Import/DataSource/CSV.php
@@ -66,6 +66,10 @@ public function buildQuickForm(&$form) {
     $config = CRM_Core_Config::singleton();
 
     $uploadFileSize = CRM_Utils_Number::formatUnitSize($config->maxFileSize . 'm', TRUE);
+    //Fetch uploadFileSize from php_ini when $config->maxFileSize is set to "no limit".
+    if (empty($uploadFileSize)) {
+      $uploadFileSize = CRM_Utils_Number::formatUnitSize(ini_get('upload_max_filesize'), TRUE);
+    }
     $uploadSize = round(($uploadFileSize / (1024 * 1024)), 2);
     $form->assign('uploadSize', $uploadSize);
     $form->add('File', 'uploadFile', ts('Import Data File'), 'size=30 maxlength=255', TRUE);
diff --git a/CRM/Import/Form/DataSource.php b/CRM/Import/Form/DataSource.php
index 7303052778cc..2270e6b74823 100644
--- a/CRM/Import/Form/DataSource.php
+++ b/CRM/Import/Form/DataSource.php
@@ -57,6 +57,11 @@ public function buildQuickForm() {
     $config = CRM_Core_Config::singleton();
 
     $uploadFileSize = CRM_Utils_Number::formatUnitSize($config->maxFileSize . 'm', TRUE);
+
+    //Fetch uploadFileSize from php_ini when $config->maxFileSize is set to "no limit".
+    if (empty($uploadFileSize)) {
+      $uploadFileSize = CRM_Utils_Number::formatUnitSize(ini_get('upload_max_filesize'), TRUE);
+    }
     $uploadSize = round(($uploadFileSize / (1024 * 1024)), 2);
 
     $this->assign('uploadSize', $uploadSize);