diff --git a/meson.build b/meson.build
index 883185fa27d..1b97379e81a 100644
--- a/meson.build
+++ b/meson.build
@@ -1414,6 +1414,7 @@ functions_to_detect = {
   'qsort_s': '',
   'posix_fallocate': '',
   'secure_getenv': '',
+  'sysconf': '#include <unistd.h>',
 }
 
 foreach f, prefix: functions_to_detect
diff --git a/src/util/os_misc.c b/src/util/os_misc.c
index 0689fec920c..6ec04832288 100644
--- a/src/util/os_misc.c
+++ b/src/util/os_misc.c
@@ -284,7 +284,7 @@ exit_mutex:
 bool
 os_get_total_physical_memory(uint64_t *size)
 {
-#if DETECT_OS_LINUX || DETECT_OS_CYGWIN || DETECT_OS_SOLARIS || DETECT_OS_HURD || DETECT_OS_MANAGARM
+#if HAVE_SYSCONF
    const long phys_pages = sysconf(_SC_PHYS_PAGES);
    const long page_size = sysconf(_SC_PAGESIZE);
 
@@ -412,7 +412,7 @@ os_get_available_system_memory(uint64_t *size)
 bool
 os_get_page_size(uint64_t *size)
 {
-#if DETECT_OS_POSIX_LITE && !DETECT_OS_APPLE && !DETECT_OS_HAIKU
+#if HAVE_SYSCONF
    const long page_size = sysconf(_SC_PAGESIZE);
 
    if (page_size <= 0)