diff --git a/sys/ld/elf.c b/sys/ld/elf.c
index 5601a2f..8cbc7ad 100644
--- a/sys/ld/elf.c
+++ b/sys/ld/elf.c
@@ -176,6 +176,7 @@ static int map_image(struct elf_image *image)
 		if (phdr.p_flags & PF_W) {
 			lseek(image->e_fd, phdr.p_offset, SEEK_SET);
 			void *dst = (void *)image->e_base + phdr.p_vaddr;
+			memset(dst, 0x0, phdr.p_memsz);
 			r = read(image->e_fd, dst, phdr.p_filesz);
 			if (r < 0) {
 				return -r;