diff --git a/src/d_netfil.c b/src/d_netfil.c
index d7611b31e..252aaabdf 100644
--- a/src/d_netfil.c
+++ b/src/d_netfil.c
@@ -62,8 +62,8 @@
 static boolean AddFileToSendQueue(INT32 node, const char *filename, UINT8 fileid);
 
 #ifdef HAVE_CURL
-size_t curlwrite_data(void *ptr, size_t size, size_t nmemb, FILE *stream);
-int curlprogress_callback(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow);
+static size_t curlwrite_data(void *ptr, size_t size, size_t nmemb, FILE *stream);
+static int curlprogress_callback(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow);
 #endif
 
 // Sender structure
@@ -1778,14 +1778,14 @@ filestatus_t findfile(char *filename, const UINT8 *wantedmd5sum, boolean complet
 }
 
 #ifdef HAVE_CURL
-size_t curlwrite_data(void *ptr, size_t size, size_t nmemb, FILE *stream)
+static size_t curlwrite_data(void *ptr, size_t size, size_t nmemb, FILE *stream)
 {
     size_t written;
     written = fwrite(ptr, size, nmemb, stream);
     return written;
 }
 
-int curlprogress_callback(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow)
+static int curlprogress_callback(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow)
 {
 	time_t curtime;