diff --git a/src/util/u_cpu_detect.c b/src/util/u_cpu_detect.c
index d67a72ee1db..a4d863170f1 100644
--- a/src/util/u_cpu_detect.c
+++ b/src/util/u_cpu_detect.c
@@ -140,7 +140,7 @@ check_os_altivec_support(void)
 #endif
 #if defined(__ALTIVEC__) && defined(__VSX__)
 /* Do nothing */
-#elif DETECT_OS_FREEBSD || (DETECT_OS_OPENBSD && HAVE_ELF_AUX_INFO) /* !__ALTIVEC__ || !__VSX__ */
+#elif DETECT_OS_FREEBSD || (DETECT_OS_OPENBSD && defined(HAVE_ELF_AUX_INFO)) /* !__ALTIVEC__ || !__VSX__ */
    unsigned long hwcap = 0;
 #ifdef HAVE_ELF_AUX_INFO
    elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));