diff --git a/src/components/superadmin/PlatformUsersTable.tsx b/src/components/superadmin/PlatformUsersTable.tsx
index c8a70fb..0385c86 100644
--- a/src/components/superadmin/PlatformUsersTable.tsx
+++ b/src/components/superadmin/PlatformUsersTable.tsx
@@ -32,8 +32,10 @@ import { formatDate } from "@/utils/format-date";
 import { usePermissions } from "@/hooks/usePermissions";
 
 // Helper function to get user initials
-const getUserInitials = (firstName: string, lastName: string): string => {
-  return `${firstName[0] || ""}${lastName[0] || ""}`.toUpperCase();
+const getUserInitials = (firstName: string | null | undefined, lastName: string | null | undefined): string => {
+  const first = (firstName || "").trim().slice(0, 1);
+  const last = (lastName || "").trim().slice(0, 1);
+  return `${first}${last}`.toUpperCase() || "?";
 };
 
 // Helper function to get status badge variant
diff --git a/src/components/superadmin/UsersTable.tsx b/src/components/superadmin/UsersTable.tsx
index f0929ab..d64f83e 100644
--- a/src/components/superadmin/UsersTable.tsx
+++ b/src/components/superadmin/UsersTable.tsx
@@ -30,8 +30,10 @@ import { useAppTheme } from "@/hooks/useAppTheme";
 import { usePermissions } from "@/hooks/usePermissions";
 
 // Helper function to get user initials
-const getUserInitials = (firstName: string, lastName: string): string => {
-  return `${firstName[0]}${lastName[0]}`.toUpperCase();
+const getUserInitials = (firstName: string | null | undefined, lastName: string | null | undefined): string => {
+  const first = (firstName || "").trim().slice(0, 1);
+  const last = (lastName || "").trim().slice(0, 1);
+  return `${first}${last}`.toUpperCase() || "?";
 };
 
 // Helper function to get status badge variant