diff --git a/lib/bcheck.c b/lib/bcheck.c
index 83130985..6f47f808 100644
--- a/lib/bcheck.c
+++ b/lib/bcheck.c
@@ -205,7 +205,7 @@ void * FASTCALL __bound_ptr_indir ## dsize (void *p, size_t offset)     \
         addr = (size_t)p - e->start;                                    \
     }                                                                   \
     addr += offset + dsize;                                             \
-    if (addr >= e->size)                                                \
+    if (addr > e->size)                                                 \
         return INVALID_POINTER; /* return an invalid pointer */         \
     return p + offset;                                                  \
 }