diff --git a/src/detection/memory/memory_sunos.c b/src/detection/memory/memory_sunos.c
index 4633eb6c0..1df271055 100644
--- a/src/detection/memory/memory_sunos.c
+++ b/src/detection/memory/memory_sunos.c
@@ -1,34 +1,10 @@
 #include "memory.h"
-#include <kstat.h>
-
-static inline void kstatFreeWrap(kstat_ctl_t** pkc)
-{
-    assert(pkc);
-    if (*pkc)
-        kstat_close(*pkc);
-}
+#include <unistd.h>
 
 const char* ffDetectMemory(FFMemoryResult* ram)
 {
-    __attribute__((__cleanup__(kstatFreeWrap))) kstat_ctl_t* kc = kstat_open();
-    if (!kc)
-        return "kstat_open() failed";
-
-    kstat_t* ks = kstat_lookup(kc, "unix", -1, "system_pages");
-    if (!ks)
-        return "kstat_lookup() failed";
-
-    if (kstat_read(kc, ks, NULL) < 0)
-        return "kstat_read() failed";
-
-    {
-        kstat_named_t* kn = kstat_data_lookup(ks, "pagestotal");
-        ram->bytesTotal = kn->value.ui64 * instance.state.platform.sysinfo.pageSize;
-    }
-    {
-        kstat_named_t* kn = kstat_data_lookup(ks, "pagesfree");
-        ram->bytesUsed = ram->bytesTotal - kn->value.ui64 * instance.state.platform.sysinfo.pageSize;
-    }
+    ram->bytesTotal = sysconf(_SC_PHYS_PAGES) * instance.state.platform.sysinfo.pageSize;
+    ram->bytesUsed = ram->bytesTotal - sysconf(_SC_AVPHYS_PAGES) * instance.state.platform.sysinfo.pageSize;
 
     return NULL;
 }