diff --git a/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp b/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
--- a/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
+++ b/libcxx/test/libcxx/strings/basic.string/string.capacity/max_size.pass.cpp
@@ -82,13 +82,19 @@
 #   else
   full_size();
 #   endif
-# elif defined(__sparc64__)
+#  elif defined(__riscv)
+#    ifdef __BIG_ENDIAN__
   half_size();
-# elif defined(_WIN32)
+#    else
   full_size();
-# else
-#   error "Your target system seems to be unsupported."
-# endif
+#    endif
+#  elif defined(__sparc64__)
+  half_size();
+#  elif defined(_WIN32)
+  full_size();
+#  else
+#    error "Your target system seems to be unsupported."
+#  endif
 
 #else