diff --git a/vm.c b/vm.c
index da3ea3c..7cfdc4e 100644
--- a/vm.c
+++ b/vm.c
@@ -118,10 +118,10 @@ static struct kmap {
   uint phys_end;
   int perm;
 } kmap[] = {
-  { (void*) KERNBASE, 0,             EXTMEM,    PTE_W},  // I/O space
-  { (void*) KERNLINK, V2P(KERNLINK), V2P(data), 0}, // kernel text+rodata
-  { (void*) data,     V2P(data),     PHYSTOP,   PTE_W},  // kernel data, memory
-  { (void*) DEVSPACE, DEVSPACE,      0,         PTE_W},  // more devices
+ { (void*)KERNBASE, 0,             EXTMEM,    PTE_W},  // I/O space
+ { (void*)KERNLINK, V2P(KERNLINK), V2P(data), 0},      // kernel text+rodata
+ { (void*)data,     V2P(data),     PHYSTOP,   PTE_W},  // kernel data+memory
+ { (void*)DEVSPACE, DEVSPACE,      0,         PTE_W},  // more devices
 };
 
 // Set up kernel part of a page table.