diff --git a/tccgen.c b/tccgen.c
index b04c6b8..9405761 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -2576,7 +2576,8 @@ ST_FUNC void vstore(void)
                 vpush_global_sym(&func_old_type, TOK_memcpy4);
             else
 #endif
-            vpush_global_sym(&func_old_type, TOK_memcpy);
+            /* Use memmove, rather than memcpy, as dest and src may be same: */
+            vpush_global_sym(&func_old_type, TOK_memmove);
 
             vswap();
             /* source */