diff --git a/sys/vmm/vmm_mmap.c b/sys/vmm/vmm_mmap.c
index 99cd205..6f02258 100644
--- a/sys/vmm/vmm_mmap.c
+++ b/sys/vmm/vmm_mmap.c
@@ -159,13 +159,17 @@
 
     kprintf("[%s:%i] mmap(%i-0x%X-%i)\n", __FILE__, __LINE__, uap->fd, uap->addr, uap->len);
 
+    if( uap->addr == 0x0 ) {
+    	K_PANIC( "ADDR = 0x0" );
+    }
+
     addr	= (vm_offset_t) uap->addr;
 
     if( uap->fd == -1 ) {
 
     	if( uap->addr != 0x0 ) {
 
-    		for( x = 0x0; x < round_page( uap->len ); x += 0x1000 ) {
+    		for( x = 0x0; x < round_page( uap->len ); x += PAGE_SIZE ) {
 
     			vmm_unmapPage( ( ( uint32_t ) uap->addr & 0xFFFFF000 ) + x, VMM_FREE );