diff --git a/libc/include/elf.h b/libc/include/elf.h
index 285eb7d..3f2e4f2 100644
--- a/libc/include/elf.h
+++ b/libc/include/elf.h
@@ -30,6 +30,8 @@
 
 #include <stdint.h>
 #include <linux/auxvec.h>
+
+/* TODO: can we switch to <linux/elf.h> instead? http://b/12476126. */
 #include <sys/exec_elf.h>
 
 typedef struct {
@@ -52,4 +54,7 @@
 #  define Elf_auxv_t Elf32_auxv_t
 #endif
 
+/* <sys/exec_elf.h> doesn't contain any NT_ constants. aarch64 strace needs this one. */
+#define NT_PRSTATUS 1
+
 #endif /* _ELF_H */
diff --git a/linker/linker.h b/linker/linker.h
index 647c36a..9afd9e1 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -29,12 +29,9 @@
 #ifndef _LINKER_H_
 #define _LINKER_H_
 
-#include <unistd.h>
-#include <sys/types.h>
 #include <elf.h>
-#include <sys/exec_elf.h>
-
 #include <link.h>
+#include <unistd.h>
 
 #include "private/libc_logging.h"