diff --git a/test/others/libcriu/lib.c b/test/others/libcriu/lib.c
index 0c7929cda..2ef81e1a6 100644
--- a/test/others/libcriu/lib.c
+++ b/test/others/libcriu/lib.c
@@ -46,7 +46,7 @@ int chk_exit(int status, int want)
 	return 1;
 }
 
-int get_version()
+void get_version(void)
 {
 	printf("Using a CRIU binary with version %d\n", criu_get_version());
 }
diff --git a/test/others/libcriu/lib.h b/test/others/libcriu/lib.h
index 59372fca5..d03836296 100644
--- a/test/others/libcriu/lib.h
+++ b/test/others/libcriu/lib.h
@@ -1,5 +1,5 @@
 void what_err_ret_mean(int ret);
 int chk_exit(int status, int want);
-int get_version(void);
+void get_version(void);
 
 #define SUCC_ECODE 42