diff --git a/defs.h b/defs.h
index 3855ce5..1643e11 100644
--- a/defs.h
+++ b/defs.h
@@ -522,7 +522,7 @@
 extern int getfdpath(struct tcb *, int, char *, unsigned);
 
 extern const char *xlookup64(const struct xlat *, const uint64_t);
-extern const char *xlat_search(const struct xlat *, const size_t, const unsigned int);
+extern const char *xlat_search(const struct xlat *, const size_t, const uint64_t);
 
 extern unsigned long get_pagesize(void);
 extern int string_to_uint(const char *str);
diff --git a/util.c b/util.c
index 2b4178c..09ce6d0 100644
--- a/util.c
+++ b/util.c
@@ -132,16 +132,16 @@
 static int
 xlat_bsearch_compare(const void *a, const void *b)
 {
-	const unsigned int val1 = (const unsigned long) a;
-	const unsigned int val2 = ((const struct xlat *) b)->val;
+	const uint64_t val1 = *(const uint64_t *) a;
+	const uint64_t val2 = ((const struct xlat *) b)->val;
 	return (val1 > val2) ? 1 : (val1 < val2) ? -1 : 0;
 }
 
 const char *
-xlat_search(const struct xlat *xlat, const size_t nmemb, const unsigned int val)
+xlat_search(const struct xlat *xlat, const size_t nmemb, const uint64_t val)
 {
 	const struct xlat *e =
-		bsearch((const void*) (const unsigned long) val,
+		bsearch((const void*) &val,
 			xlat, nmemb, sizeof(*xlat), xlat_bsearch_compare);
 
 	return e ? e->str : NULL;