diff --git a/tests/libtest/lib547.c b/tests/libtest/lib547.c
index ffd79df6d0f35e375f427841d0fdd52378a4d664..0513911d6bf0fd00dbe8d6caa04a3d8f7f72c9e6 100644
--- a/tests/libtest/lib547.c
+++ b/tests/libtest/lib547.c
@@ -16,6 +16,7 @@
 
 #define UPLOADTHIS "this is the blurb we want to upload\n"
 
+#ifndef LIB548
 static size_t readcallback(void  *ptr,
                            size_t size,
                            size_t nmemb,
@@ -28,6 +29,7 @@ static size_t readcallback(void  *ptr,
   }
   return 0;
 }
+#endif
 
 int test(char *URL)
 {