diff --git a/test/datatype/checksum.c b/test/datatype/checksum.c
index cf16c65fa2..fc65acabb3 100644
--- a/test/datatype/checksum.c
+++ b/test/datatype/checksum.c
@@ -15,6 +15,7 @@
 #include "ompi/datatype/datatype.h"
 #include "ompi/datatype/datatype_checksum.h"
 
+#include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
 
diff --git a/test/datatype/position.c b/test/datatype/position.c
index 008a8e14b4..99693880bf 100644
--- a/test/datatype/position.c
+++ b/test/datatype/position.c
@@ -11,6 +11,7 @@
  */
 
 #include "ompi_config.h"
+#include <stdio.h>
 #include <string.h>
 #include "ompi/datatype/convertor.h"
 #include "ompi/datatype/datatype.h"