diff --git a/src/main.c b/src/main.c
index 6d8a21bf0..256a35e94 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3457,7 +3457,8 @@ operate(struct Configurable *config, int argc, char *argv[])
 #else
         if((res!=CURLE_OK) && config->showerror) {
           fprintf(config->errors, "curl: (%d) %s\n", (int)res,
-                  errorbuffer[0]? errorbuffer: curl_easy_strerror(res));
+                  errorbuffer[0]? errorbuffer:
+                  curl_easy_strerror((CURLcode)res));
           if(CURLE_SSL_CACERT == res) {
 #define CURL_CA_CERT_ERRORMSG1 \
 "More details here: http://curl.haxx.se/docs/sslcerts.html\n\n" \