--- absl/debugging/internal/vdso_support.cc.orig	2021-11-03 15:26:14 UTC
+++ absl/debugging/internal/vdso_support.cc
@@ -51,7 +51,9 @@
 #endif
 
 #if defined(__FreeBSD__)
+#if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64
 using Elf64_auxv_t = Elf64_Auxinfo;
+#endif
 using Elf32_auxv_t = Elf32_Auxinfo;
 #endif