diff --git a/esp-wifi/src/lib.rs b/esp-wifi/src/lib.rs
index 8f6e06e0ef0..b29b47cbbff 100644
--- a/esp-wifi/src/lib.rs
+++ b/esp-wifi/src/lib.rs
@@ -92,8 +92,11 @@ const HEAP_SIZE: usize = 64 * 1024;
 #[cfg(all(coex, not(feature = "big-heap")))]
 const HEAP_SIZE: usize = 64 * 1024;
 
-#[cfg(all(not(coex), feature = "big-heap"))]
-const HEAP_SIZE: usize = 100 * 1024;
+#[cfg(all(not(coex), not(feature = "esp32s2"), feature = "big-heap"))]
+const HEAP_SIZE: usize = 92 * 1024;
+
+#[cfg(all(not(coex), feature = "esp32s2", feature = "big-heap"))]
+const HEAP_SIZE: usize = 72 * 1024;
 
 #[cfg(all(coex, feature = "big-heap"))]
 const HEAP_SIZE: usize = 100 * 1024;