diff --git a/core/elf.c b/core/elf.c
index 8f4ccc1..ab9a559 100644
--- a/core/elf.c
+++ b/core/elf.c
@@ -138,17 +138,17 @@ uaddr_t loadElfProg(const char *prog, struct process *proc)
             unrefPhyPage(ppage);
         }
 
-        // Hack: Even if already allocated mark the adresse space as managed by a ressource
-        // So this address space is not used by another ressource.
-        uaddr = elf_phdrs[i].p_vaddr;
-        zeroMmap(as, &uaddr, elf_phdrs[i].p_memsz, PAGING_MEM_USER | PAGING_MEM_WRITE | PAGING_MEM_READ, 0);
-
         /* Copy segment into memory */
         memcpy((void *)elf_phdrs[i].p_vaddr, (void *)(prog + elf_phdrs[i].p_offset),
                elf_phdrs[i].p_filesz);
         if (lastUserAddr < uaddr) {
             lastUserAddr = uaddr;
         }
+
+        // Hack: Even if already allocated mark the adresse space as managed by a ressource
+        // So this address space is not used by another ressource.
+        uaddr = elf_phdrs[i].p_vaddr;
+        zeroMmap(as, &uaddr, elf_phdrs[i].p_memsz, PAGING_MEM_USER | PAGING_MEM_WRITE | PAGING_MEM_READ, 0);
     }
 
     processInitHeap(proc, lastUserAddr);