diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c
--- a/sys/kern/kern_exec.c
+++ b/sys/kern/kern_exec.c
@@ -1314,7 +1314,7 @@
 		    MAP_INHERIT_SHARE | MAP_ACC_NO_CHARGE);
 	} else {
 		sharedpage_addr = sv->sv_shared_page_base;
-		vm_map_fixed(map, obj, 0,
+		error = vm_map_fixed(map, obj, 0,
 		    sharedpage_addr, sv->sv_shared_page_len,
 		    VM_PROT_READ | VM_PROT_EXECUTE,
 		    VM_PROT_READ | VM_PROT_EXECUTE,