diff --git a/src/hooks/use-mobile.tsx b/src/hooks/use-mobile.tsx
index 502fd323..d71598a5 100644
--- a/src/hooks/use-mobile.tsx
+++ b/src/hooks/use-mobile.tsx
@@ -6,6 +6,8 @@ export function useIsMobile() {
   const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined);
 
   React.useEffect(() => {
+    if (typeof window === 'undefined') return;
+    
     const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`);
     const onChange = () => {
       setIsMobile(window.innerWidth < MOBILE_BREAKPOINT);