diff --git a/security/sandbox/mac/SandboxPolicyContent.h b/security/sandbox/mac/SandboxPolicyContent.h
index 102bb95e81da..820931c8f1a6 100644
--- a/security/sandbox/mac/SandboxPolicyContent.h
+++ b/security/sandbox/mac/SandboxPolicyContent.h
@@ -111,6 +111,7 @@ static const char SandboxPolicyContent[] = R"SANDBOX_LITERAL(
     ; removing it.
     (sysctl-name "kern.hostname")
     (sysctl-name "hw.machine")
+    (sysctl-name "hw.memsize")
     (sysctl-name "hw.model")
     (sysctl-name "hw.ncpu")
     (sysctl-name "hw.activecpu")