diff --git a/ftpfs.c b/ftpfs.c
index a4ed3e3..574a9f9 100644
--- a/ftpfs.c
+++ b/ftpfs.c
@@ -262,7 +262,7 @@ static size_t read_data(void *ptr, size_t size, size_t nmemb, void *data) {
   do {\
     CURLcode res = curl_easy_setopt(handle, option, __VA_ARGS__);\
     if (res != CURLE_OK) {\
-      fprintf(stderr, "Error setting curl: %s\n", error_buf);\
+      fprintf(stderr, "Error setting curl option %d: %s\n", option, error_buf);\
       exit(1);\
     }\
   }while(0)