diff --git a/tests/psa-client-server/psasim/include/util.h b/tests/psa-client-server/psasim/include/util.h
index 5eb8238c5c..dfc9a32379 100644
--- a/tests/psa-client-server/psasim/include/util.h
+++ b/tests/psa-client-server/psasim/include/util.h
@@ -7,6 +7,8 @@
 
 #include "service.h"
 
+#include <stdio.h>
+
 #define PRINT(fmt, ...) \
     fprintf(stdout, fmt "\n", ##__VA_ARGS__)