diff --git a/embed.fnc b/embed.fnc
index 15ac778b6e..b3d92cd82d 100644
--- a/embed.fnc
+++ b/embed.fnc
@@ -6125,19 +6125,19 @@ S	|STRLEN |sv_pos_u2b_cached					\
 				|NN SV * const sv			\
 				|NN MAGIC ** const mgp			\
 				|SPTR const U8 * const start		\
-				|EPTRge const U8 * const send		\
+				|EPTRgt const U8 * const send		\
 				|STRLEN uoffset 			\
 				|STRLEN uoffset0			\
 				|STRLEN boffset0
 ST	|STRLEN |sv_pos_u2b_forwards					\
 				|SPTR const U8 * const start		\
-				|EPTRge const U8 * const send		\
+				|EPTRgt const U8 * const send		\
 				|NN STRLEN * const uoffset		\
 				|NN bool * const at_end 		\
 				|NN bool *canonical_position
 ST	|STRLEN |sv_pos_u2b_midway					\
 				|SPTR const U8 * const start		\
-				|EPTRge const U8 *send			\
+				|EPTRgt const U8 *send			\
 				|STRLEN uoffset 			\
 				|const STRLEN uend
 i	|void	|sv_unglob	|NN SV * const sv			\
diff --git a/proto.h b/proto.h
index ac0fb1c1c8..625e422e03 100644
--- a/proto.h
+++ b/proto.h
@@ -9292,18 +9292,18 @@ STATIC STRLEN
 S_sv_pos_u2b_cached(pTHX_ SV * const sv, MAGIC ** const mgp, const U8 * const start, const U8 * const send, STRLEN uoffset, STRLEN uoffset0, STRLEN boffset0);
 # define PERL_ARGS_ASSERT_SV_POS_U2B_CACHED     \
         assert(sv); assert(mgp); assert(start); assert(send); \
-        assert(start <= send)
+        assert(start < send)
 
 STATIC STRLEN
 S_sv_pos_u2b_forwards(const U8 * const start, const U8 * const send, STRLEN * const uoffset, bool * const at_end, bool *canonical_position);
 # define PERL_ARGS_ASSERT_SV_POS_U2B_FORWARDS   \
         assert(start); assert(send); assert(uoffset); assert(at_end); \
-        assert(canonical_position); assert(start <= send)
+        assert(canonical_position); assert(start < send)
 
 STATIC STRLEN
 S_sv_pos_u2b_midway(const U8 * const start, const U8 *send, STRLEN uoffset, const STRLEN uend);
 # define PERL_ARGS_ASSERT_SV_POS_U2B_MIDWAY     \
-        assert(start); assert(send); assert(start <= send)
+        assert(start); assert(send); assert(start < send)
 
 STATIC void
 S_utf8_mg_len_cache_update(pTHX_ SV * const sv, MAGIC ** const mgp, const STRLEN ulen);