diff --git a/src/detection/memory/memory_obsd.c b/src/detection/memory/memory_obsd.c
index c4119efb3..9efc21ead 100644
--- a/src/detection/memory/memory_obsd.c
+++ b/src/detection/memory/memory_obsd.c
@@ -1,20 +1,17 @@
 #include "memory.h"
 #include "common/sysctl.h"
 
-#include <sys/vmmeter.h>
+#include <sys/param.h>
 
 const char* ffDetectMemory(FFMemoryResult* ram)
 {
-    size_t length = sizeof(ram->bytesTotal);
-    if (sysctl((int[]){ CTL_HW, HW_PHYSMEM }, 2, &ram->bytesTotal, &length, NULL, 0) < 0)
-        return "Failed to read hw.physmem";
+    struct uvmexp buf;
+    size_t length = sizeof(buf);
+    if (sysctl((int[]){ CTL_VM, VM_UVMEXP }, 2, &buf, &length, NULL, 0) < 0)
+        return "sysctl(CTL_VM, VM_UVMEXP) failed";
 
-    struct vmtotal vmtotal;
-    length = sizeof(vmtotal);
-    if (sysctl((int[]) {CTL_VM, VM_METER}, 2, &vmtotal, &length, NULL, 0) < 0)
-        return "sysctl(VM_METER) failed";
-
-    ram->bytesUsed = ram->bytesTotal - vmtotal.t_free * instance.state.platform.sysinfo.pageSize;
+    ram->bytesTotal = (uint64_t) buf.npages * instance.state.platform.sysinfo.pageSize;
+    ram->bytesUsed = ram->bytesTotal - (uint64_t) buf.free * instance.state.platform.sysinfo.pageSize;
 
     return NULL;
 }