diff --git a/src/bhyve/bhyve_command.c b/src/bhyve/bhyve_command.c
index 9413ae5c16fd1bd9cf8c680637b9f5590a41af2d..e3f7ded7dbb6ffb6d5e13a385f41c44f5df2f422 100644
--- a/src/bhyve/bhyve_command.c
+++ b/src/bhyve/bhyve_command.c
@@ -474,6 +474,9 @@ virBhyveProcessBuildBhyveCmd(virConnectPtr conn,
     virCommandAddArgFormat(cmd, "%llu",
                            VIR_DIV_UP(virDomainDefGetMemoryInitial(def), 1024));
 
+    if (def->mem.locked)
+        virCommandAddArg(cmd, "-S"); /* Wire guest memory */
+
     /* Options */
     if (def->features[VIR_DOMAIN_FEATURE_ACPI] == VIR_TRISTATE_SWITCH_ON)
         virCommandAddArg(cmd, "-A"); /* Create an ACPI table */
diff --git a/src/bhyve/bhyve_parse_command.c b/src/bhyve/bhyve_parse_command.c
index fcaaed2759bfb30565db29aa9b7df1ca3dc5c796..14137d179b821043e3a0f707d30c1368bdb20384 100644
--- a/src/bhyve/bhyve_parse_command.c
+++ b/src/bhyve/bhyve_parse_command.c
@@ -721,6 +721,9 @@ bhyveParseBhyveCommandLine(virDomainDefPtr def,
                 goto error;
             }
             break;
+        case 'S':
+            def->mem.locked = true;
+            break;
         }
     }