diff --git a/exec.c b/exec.c
index c85321a..6a5adab 100644
--- a/exec.c
+++ b/exec.c
@@ -1347,6 +1347,8 @@
 
     assert(block);
 
+    newsize = TARGET_PAGE_ALIGN(newsize);
+
     if (block->used_length == newsize) {
         return 0;
     }