diff --git a/.changeset/sharp-bobcats-happen.md b/.changeset/sharp-bobcats-happen.md
new file mode 100644
index 0000000000..b4345443fb
--- /dev/null
+++ b/.changeset/sharp-bobcats-happen.md
@@ -0,0 +1,5 @@
+---
+"@nextui-org/system-rsc": patch
+---
+
+handled defaultVariants null case in extendVariants (#3502)
diff --git a/packages/core/system-rsc/src/extend-variants.js b/packages/core/system-rsc/src/extend-variants.js
index 27387cdf9a..21145d34a7 100644
--- a/packages/core/system-rsc/src/extend-variants.js
+++ b/packages/core/system-rsc/src/extend-variants.js
@@ -47,14 +47,17 @@ function getClassNamesWithProps({
   const customTv = tv(
     {
       variants,
-      // Do not apply default variants when the props variant is different
-      defaultVariants: Object.keys(defaultVariants)
-        .filter((k) => !keys.includes(k))
-        .reduce((o, k) => {
-          o[k] = defaultVariants[k];
-
-          return o;
-        }, []),
+      defaultVariants:
+        defaultVariants && typeof defaultVariants === "object"
+          ? // Do not apply default variants when the props variant is different
+            Object.keys(defaultVariants)
+              .filter((k) => !keys.includes(k))
+              .reduce((o, k) => {
+                o[k] = defaultVariants[k];
+
+                return o;
+              }, [])
+          : defaultVariants,
       compoundVariants,
       ...(hasSlots && {slots}),
     },