1 files changed, 6 insertions, 1 deletions

diff --git a/include/libbb.h b/include/libbb.h
index daa96728b..d2563999a 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1828,7 +1828,12 @@ struct smaprec {
         unsigned long stack;
         unsigned long smap_pss, smap_swap;
         unsigned long smap_size;
-        unsigned long smap_start;
+        // For mixed 32/64 userspace, 32-bit pmap still needs
+        // 64-bit field here to correctly show 64-bit processes:
+        unsigned long long smap_start;
+        // (strictly speaking, other fields need to be wider too,
+        // but they are in kbytes, not bytes, and they hold sizes,
+        // not start addresses, sizes tend to be less than 4 terabytes)
         char smap_mode[5];
         char *smap_name;
 };