diff --git a/tests/server/sws.c b/tests/server/sws.c
index dabcffa41ce6598d5b2d06a299d110805baf2f5d..31dea2ac565b83a176269689105123644f8d4e6f 100644
--- a/tests/server/sws.c
+++ b/tests/server/sws.c
@@ -120,7 +120,7 @@ void storerequest(char *reqbuf);
 #define REQUEST_DUMP  "log/server.input"
 #define RESPONSE_DUMP "log/server.response"
 
-#define TEST_DATA_PATH "%s/data/test%d"
+#define TEST_DATA_PATH "%s/data/test%ld"
 
 /* very-big-path support */
 #define MAXDOCNAMELEN 140000