Index: lib/sanitizer_common/sanitizer_platform_limits_posix.cc
===================================================================
--- lib/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ lib/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -123,6 +123,9 @@
 #  include <asm/ptrace.h>
 #  ifdef __arm__
 typedef struct user_fpregs elf_fpregset_t;
+#   if !defined(ARM_VFPREGS_SIZE)
+#     define ARM_VFPREGS_SIZE (32 * 8 /*fpregs*/ + 4 /*fpscr*/)
+#   endif
 #  endif
 # endif
 # include <semaphore.h>