diff --git a/servers/vm/mmap.c b/servers/vm/mmap.c
index 9def7b482..dcb27b1da 100644
--- a/servers/vm/mmap.c
+++ b/servers/vm/mmap.c
@@ -316,6 +316,9 @@ PUBLIC int do_munmap(message *m)
 
 	if(!(vmp->vm_flags & VMF_HASPT))
 		return ENXIO;
+
+	/* Temporarily disable munmap() to mask memory problem. */
+	return OK;
         
 	if(m->m_type == VM_MUNMAP) {
 	        addr = (vir_bytes) arch_vir2map(vmp, (vir_bytes) m->VMUM_ADDR);