diff --git a/src/arena_allocator.cpp b/src/arena_allocator.cpp
index 16ce262..e6863be 100644
--- a/src/arena_allocator.cpp
+++ b/src/arena_allocator.cpp
@@ -77,32 +77,29 @@ void *ArenaAllocator::realloc_raw(void *ptr, uint32_t old_size,
   assert(current_block_ &&
          "realloc called with non-null ptr but no current block exists");
 
-  // Assert that offset is large enough (should always be true for
-  // valid callers)
-  assert(current_block_->offset >= old_size &&
-         "offset must be >= old_size for valid last allocation");
+  if (current_block_->offset >= old_size) {
+    // Check if this was the last allocation by comparing with expected location
+    char *expected_last_alloc_start =
+        current_block_->data() + current_block_->offset - old_size;
 
-  // Check if this was the last allocation by comparing with expected location
-  char *expected_last_alloc_start =
-      current_block_->data() + current_block_->offset - old_size;
+    if (ptr == expected_last_alloc_start) {
+      // This is indeed the last allocation
+      if (new_size > old_size) {
+        // Growing - check if we have space
+        size_t additional_space_needed = new_size - old_size;
 
-  if (ptr == expected_last_alloc_start) {
-    // This is indeed the last allocation
-    if (new_size > old_size) {
-      // Growing - check if we have space
-      size_t additional_space_needed = new_size - old_size;
-
-      if (current_block_->offset + additional_space_needed <=
-          current_block_->size) {
-        // We can extend in place
-        current_block_->offset += additional_space_needed;
-        return ptr;
+        if (current_block_->offset + additional_space_needed <=
+            current_block_->size) {
+          // We can extend in place
+          current_block_->offset += additional_space_needed;
+          return ptr;
+        }
+      } else {
+        // Shrinking - just update the offset
+        size_t space_to_free = old_size - new_size;
+        current_block_->offset -= space_to_free;
+        return new_size == 0 ? nullptr : ptr;
       }
-    } else {
-      // Shrinking - just update the offset
-      size_t space_to_free = old_size - new_size;
-      current_block_->offset -= space_to_free;
-      return new_size == 0 ? nullptr : ptr;
     }
   }