diff --git a/src/regexp-stack.h b/src/regexp-stack.h
index 43f8f3d84c..e47462ffd4 100644
--- a/src/regexp-stack.h
+++ b/src/regexp-stack.h
@@ -79,7 +79,7 @@ class RegExpStack {
   static const size_t kMinimumStackSize = 1 * KB;
 
   // Maximal size of allocated stack area.
-  static const size_t kMaximumStackSize = 256 * KB;
+  static const size_t kMaximumStackSize = 64 * MB;
 
   // Structure holding the allocated memory, size and limit.
   struct ThreadLocal {