diff --git a/includes/pages/admin_active.php b/includes/pages/admin_active.php
index 241d0904..7811d795 100644
--- a/includes/pages/admin_active.php
+++ b/includes/pages/admin_active.php
@@ -92,7 +92,7 @@ function admin_active() {
       $match = false;
       $index = join("", $usr);
       foreach ($tokens as $t)
-        if (strstr($index, trim($t))) {
+        if (stristr($index, trim($t))) {
         $match = true;
         break;
       }
diff --git a/includes/pages/admin_arrive.php b/includes/pages/admin_arrive.php
index 70a43394..805813cd 100644
--- a/includes/pages/admin_arrive.php
+++ b/includes/pages/admin_arrive.php
@@ -35,7 +35,7 @@ function admin_arrive() {
       $match = false;
       $index = join("", $usr);
       foreach ($tokens as $t)
-        if (strstr($index, trim($t))) {
+        if (stristr($index, trim($t))) {
         $match = true;
         break;
       }
@@ -57,4 +57,4 @@ function admin_arrive() {
     'link' => page_link_to('admin_arrive')
   ));
 }
-?>
\ No newline at end of file
+?>
diff --git a/includes/pages/admin_free.php b/includes/pages/admin_free.php
index 88a96965..43b2e1a7 100644
--- a/includes/pages/admin_free.php
+++ b/includes/pages/admin_free.php
@@ -33,7 +33,7 @@ function admin_free() {
 			$match = false;
 			$index = join("", $usr);
 			foreach ($tokens as $t)
-				if (strstr($index, trim($t))) {
+				if (stristr($index, trim($t))) {
 					$match = true;
 					break;
 				}