diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index a343fb5ad0..42185cc111 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -2986,7 +2986,7 @@ static uintptr_t pgb_try_itree(const PGBAddrs *ga, uintptr_t base,
 static uintptr_t pgb_find_itree(const PGBAddrs *ga, IntervalTreeRoot *root,
                                 uintptr_t align, uintptr_t brk)
 {
-    uintptr_t last = mmap_min_addr;
+    uintptr_t last = sizeof(uintptr_t) == 4 ? MiB : GiB;
     uintptr_t base, skip;
 
     while (true) {