diff --git a/src/server/slavefuncs.h b/src/server/slavefuncs.h
--- a/src/server/slavefuncs.h
+++ b/src/server/slavefuncs.h
@@ -27,7 +27,7 @@
 
 xmlNodePtr xml_quickxpath(xmlXPathContextPtr xpathctxt, xmlChar *path);
 void tell_the_server(char *stuff);
-int delete_jobdata(int jobnum, char datadir);
+int delete_jobdata(int jobnum, char *datadir);
 size_t curl_writetodisk(void *ptr, size_t size, size_t nmemb, FILE *stream);
 int curlget(char *url, char *out);
 int curlpost(char *filename, char *url);