diff --git a/src/p_lx_elf.cpp b/src/p_lx_elf.cpp
index d2ba5612..366869a9 100644
--- a/src/p_lx_elf.cpp
+++ b/src/p_lx_elf.cpp
@@ -1165,7 +1165,7 @@ PackLinuxElf64::generateElfHdr(
         set_native64(&h2->phdr[1].p_paddr, brkb);
         h2->phdr[1].p_filesz = 0;
         h2->phdr[1].p_memsz =  0;
-        set_native64(&h2->phdr[1].p_flags, Elf64_Phdr::PF_R | Elf64_Phdr::PF_W);
+        set_native32(&h2->phdr[1].p_flags, Elf64_Phdr::PF_R | Elf64_Phdr::PF_W);
 #undef PAGE_MASK
     }
     if (ph.format==getFormat()) {