diff --git a/frontend/drivers/platform_linux.c b/frontend/drivers/platform_linux.c
index 336ff00751..5a0ca96889 100644
--- a/frontend/drivers/platform_linux.c
+++ b/frontend/drivers/platform_linux.c
@@ -1912,9 +1912,49 @@ static void frontend_linux_exitspawn(char *core_path, size_t core_path_size)
 
 static uint64_t frontend_linux_get_mem_total(void)
 {
-   long pages     = sysconf(_SC_PHYS_PAGES);
-   long page_size = sysconf(_SC_PAGE_SIZE);
-   return pages * page_size;
+   /* Prefer sysctl() over sysconf() except sysctl() HW_REALMEM and HW_PHYSMEM */
+#if defined(CTL_HW) && (defined(HW_MEMSIZE) || defined(HW_PHYSMEM64))
+   int mib[2];
+   mib[0] = CTL_HW;
+#if defined(HW_MEMSIZE)
+   mib[1] = HW_MEMSIZE;            /* OSX. --------------------- */
+#elif defined(HW_PHYSMEM64)
+   mib[1] = HW_PHYSMEM64;          /* NetBSD, OpenBSD. --------- */
+#endif
+   int64_t size = 0;               /* 64-bit */
+   size_t len = sizeof( size );
+   if ( sysctl( mib, 2, &size, &len, NULL, 0 ) == 0 )
+      return (size_t)size;
+   return 0L;			/* Failed? */
+#elif defined(_SC_AIX_REALMEM)
+   /* AIX. ----------------------------------------------------- */
+   return (size_t)sysconf( _SC_AIX_REALMEM ) * (size_t)1024L;
+
+#elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
+   /* FreeBSD, Linux, OpenBSD, and Solaris. -------------------- */
+   return (size_t)sysconf( _SC_PHYS_PAGES ) *
+      (size_t)sysconf( _SC_PAGESIZE );
+
+#elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGE_SIZE)
+   /* Legacy. -------------------------------------------------- */
+   return (size_t)sysconf( _SC_PHYS_PAGES ) *
+      (size_t)sysconf( _SC_PAGE_SIZE );
+
+#elif defined(CTL_HW) && (defined(HW_PHYSMEM) || defined(HW_REALMEM))
+   /* DragonFly BSD, FreeBSD, NetBSD, OpenBSD, and OSX. -------- */
+   int mib[2];
+   mib[0] = CTL_HW;
+#if defined(HW_REALMEM)
+   mib[1] = HW_REALMEM;		/* FreeBSD. ----------------- */
+#elif defined(HW_PYSMEM)
+   mib[1] = HW_PHYSMEM;		/* Others. ------------------ */
+#endif
+   unsigned int size = 0;		/* 32-bit */
+   size_t len = sizeof( size );
+   if ( sysctl( mib, 2, &size, &len, NULL, 0 ) == 0 )
+      return (size_t)size;
+   return 0L;			/* Failed? */
+#endif /* sysctl and sysconf variants */
 }
 
 static uint64_t frontend_linux_get_mem_used(void)