diff --git a/src/coreclr/gc/gc.cpp b/src/coreclr/gc/gc.cpp
index 768bba0f1001a..ddae524ef0d07 100644
--- a/src/coreclr/gc/gc.cpp
+++ b/src/coreclr/gc/gc.cpp
@@ -1839,9 +1839,9 @@ uint8_t* gc_heap::pad_for_alignment_large (uint8_t* newAlloc, int requiredAlignm
 
 //CLR_SIZE  is the max amount of bytes from gen0 that is set to 0 in one chunk
 #ifdef SERVER_GC
-#define CLR_SIZE ((size_t)(8*1024))
+#define CLR_SIZE ((size_t)(8*1024+32))
 #else //SERVER_GC
-#define CLR_SIZE ((size_t)(8*1024))
+#define CLR_SIZE ((size_t)(8*1024+32))
 #endif //SERVER_GC
 
 #define END_SPACE_AFTER_GC (loh_size_threshold + MAX_STRUCTALIGN)
diff --git a/src/coreclr/gc/gcpriv.h b/src/coreclr/gc/gcpriv.h
index bc7b148bda8e8..a87d85869c492 100644
--- a/src/coreclr/gc/gcpriv.h
+++ b/src/coreclr/gc/gcpriv.h
@@ -5653,6 +5653,7 @@ struct gap_reloc_pair
 
 struct DECLSPEC_ALIGN(8) aligned_plug_and_gap
 {
+    size_t       additional_pad;
     plug_and_gap plugandgap;
 };