diff --git a/tools/test/perform/pio_standalone.c b/tools/test/perform/pio_standalone.c
index f6866bbff8..0fba904c54 100644
--- a/tools/test/perform/pio_standalone.c
+++ b/tools/test/perform/pio_standalone.c
@@ -18,6 +18,9 @@
 
 #include "pio_perf.h"
 
+#ifdef STANDALONE
+MPI_Info    h5_io_info_g=MPI_INFO_NULL;/* MPI INFO object for IO */
+#endif
 
 /** From h5tools_utils.c **/