diff --git a/lib/std/core/allocators/temp_allocator.c3 b/lib/std/core/allocators/temp_allocator.c3
index 9d211a5cd..72ac77b46 100644
--- a/lib/std/core/allocators/temp_allocator.c3
+++ b/lib/std/core/allocators/temp_allocator.c3
@@ -68,6 +68,7 @@ fn void TempAllocator.reset(&self, usz mark) @dynamic
 	TempAllocatorPage *last_page = self.last_page;
 	while (last_page && last_page.mark > mark)
 	{
+		self.used = last_page.mark;
 		TempAllocatorPage *to_free = last_page;
 		last_page = last_page.prev_page;
 		self._free_page(to_free)!!;
diff --git a/releasenotes.md b/releasenotes.md
index 7680a3718..b642d75b8 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -36,6 +36,7 @@
 - Crash invoking a `@body` argument with the wrong number of parameters.
 - Fix reordering semantics in struct assignment.
 - Regression when passing types as `#expr` arguments. #1461
+- Temp allocator overwrites data when doing reset on extra allocated pages. #1462
 
 ### Stdlib changes
 - Additional init functions for hashmap.