diff --git a/crypto/bn/bn_lcl.h b/crypto/bn/bn_lcl.h
index 97c35ea5958c2c88cd47ac9f38025bff539c7095..9c959921b49198fc7094cb16ed714ef5b38cf0d0 100644
--- a/crypto/bn/bn_lcl.h
+++ b/crypto/bn/bn_lcl.h
@@ -228,7 +228,7 @@ extern "C" {
 /* This is used for internal error checking and is not normally used */
 #ifdef BN_DEBUG
 # include <assert.h>
-# define bn_check_top(a) assert ((a)->top >= 0 && (a)->top <= (a)->max);
+# define bn_check_top(a) assert ((a)->top >= 0 && (a)->top <= (a)->dmax);
 #else
 # define bn_check_top(a)
 #endif