diff --git a/src/os/darwin/darwin_sigar.c b/src/os/darwin/darwin_sigar.c
index 35ddaf64..98c7c3d7 100644
--- a/src/os/darwin/darwin_sigar.c
+++ b/src/os/darwin/darwin_sigar.c
@@ -197,6 +197,9 @@ int sigar_os_close(sigar_t *sigar)
     if (sigar->pinfo) {
         free(sigar->pinfo);
     }
+    if (sigar->kmem) {
+        kvm_close(sigar->kmem);
+    }
     free(sigar);
     return SIGAR_OK;
 }