diff --git a/servers/vm/arch/i386/pagetable.c b/servers/vm/arch/i386/pagetable.c
index 67a99d2f2..0f0a6401d 100644
--- a/servers/vm/arch/i386/pagetable.c
+++ b/servers/vm/arch/i386/pagetable.c
@@ -54,7 +54,13 @@ struct vmproc *vmprocess = &vmproc[VM_PROC_NR];
  * circular dependency on allocating memory and writing it into VM's
  * page table.
  */
+#if SANITYCHECKS
+#define SPAREPAGES 100
+#define STATIC_SPAREPAGES 90
+#else
 #define SPAREPAGES 15
+#define STATIC_SPAREPAGES 10
+#endif
 int missing_spares = SPAREPAGES;
 static struct {
 	void *page;
@@ -85,9 +91,8 @@ int kernmappings = 0;
 phys_bytes page_directories_phys;
 u32_t *page_directories = NULL;
 
-#define STATIC_SPAREPAGES 10
-
-static char static_sparepages[I386_PAGE_SIZE*STATIC_SPAREPAGES + I386_PAGE_SIZE] __aligned(I386_PAGE_SIZE);
+static char static_sparepages[I386_PAGE_SIZE*STATIC_SPAREPAGES] 
+	__aligned(I386_PAGE_SIZE);
 
 #if SANITYCHECKS
 /*===========================================================================*
@@ -1014,7 +1019,6 @@ void pt_init(void)
 
 	/* Inform kernel vm has a newly built page table. */
 	assert(vmproc[VM_PROC_NR].vm_endpoint == VM_PROC_NR);
-	pt_mapkernel(newpt);
 	pt_bind(newpt, &vmproc[VM_PROC_NR]);
 
         /* All OK. */
diff --git a/servers/vm/main.c b/servers/vm/main.c
index 6f5b2781f..7eb00c74c 100644
--- a/servers/vm/main.c
+++ b/servers/vm/main.c
@@ -317,8 +317,6 @@ void init_vm(void)
 
 #if SANITYCHECKS
 	env_parse("vm_sanitychecklevel", "d", 0, &vm_sanitychecklevel, 0, SCL_MAX);
-
-	vm_sanitychecklevel = 1;
 #endif
 
 	/* Get chunks of available memory. */
diff --git a/servers/vm/region.c b/servers/vm/region.c
index 857b498db..c3827ae13 100644
--- a/servers/vm/region.c
+++ b/servers/vm/region.c
@@ -269,7 +269,7 @@ void map_sanitycheck(char *file, int line)
 		if(pr->ph->refcount != pr->ph->seencount) {
 			map_printmap(vmp);
 			printf("ph in vr %p: 0x%lx-0x%lx  refcount %d "
-				"but seencount %lu\n", 
+				"but seencount %u\n", 
 				vr, pr->offset,
 				pr->offset + pr->ph->length,
 				pr->ph->refcount, pr->ph->seencount);